The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Dauming Hsieh - One of the best experts on this subject based on the ideXlab platform.
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process research and development for an efficient synthesis of the hiv protease inhibitor bms 232632
Organic Process Research & Development, 2002Co-Authors: Zhongmin Xu, Michael J Humora, Fernando Quiroz, Thomas P. Kissick, Bharat P. Patel, Janak Singh, Bin Zheng, Mark D. Schwinden, Lin Dong, Dauming HsiehAbstract:Development of an efficient and scalable process for the human immunodeficiency virus (HIV) protease inhibitor BMS-232632 1-[4-(pyridin-2-yl)phenyl]-5(S)-2,5-bis{[N-(methoxycarbonyl)-l-tert-leucinyl]-amino}-4(S)-hydroxy-6-phenyl-2-azahexane, is described. The key step in the synthesis of the intermediate N-1-(tert-butyloxycarbonyl)-N-2-[4-(pyridin-2-yl)benzylidene]hydrazone (11) was the Pd-mediated coupling of boronic acid 9 with 2-bromopyridine. An efficient procedure was developed for the chemoselective reduction of hydrazone 11 to hydrazine carbamate 4. The key intermediate N-(tert-butyloxycarbonyl)-2(S)-amino-1-phenyl-3(R)-3,4-epoxy-butane (6) was prepared stereoselectively from chiral diol 10. The subsequent union of 4 and 6 followed by coupling with N-methoxycarbonyl-l-tert-leucine provided the free base BMS-232632 in high yield. Evaluation of a variety of salts and identification of bisulfate salt 19 with enhanced bioavailability are also described.
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process research and development for an efficient synthesis of the hiv protease inhibitor bms 232632
Organic Process Research & Development, 2002Co-Authors: Zhongmin Xu, Michael J Humora, Fernando Quiroz, Thomas P. Kissick, Bharat P. Patel, Janak Singh, Bin Zheng, Mark D. Schwinden, Lin Dong, Dauming HsiehAbstract:Development of an efficient and scalable process for the human immunodeficiency virus (HIV) protease inhibitor BMS-232632 1-[4-(pyridin-2-yl)phenyl]-5(S)-2,5-bis{[N-(methoxycarbonyl)-l-tert-leucinyl]-amino}-4(S)-hydroxy-6-phenyl-2-azahexane, is described. The key step in the synthesis of the intermediate N-1-(tert-butyloxycarbonyl)-N-2-[4-(pyridin-2-yl)benzylidene]hydrazone (11) was the Pd-mediated coupling of boronic acid 9 with 2-bromopyridine. An efficient procedure was developed for the chemoselective reduction of hydrazone 11 to hydrazine carbamate 4. The key intermediate N-(tert-butyloxycarbonyl)-2(S)-amino-1-phenyl-3(R)-3,4-epoxy-butane (6) was prepared stereoselectively from chiral diol 10. The subsequent union of 4 and 6 followed by coupling with N-methoxycarbonyl-l-tert-leucine provided the free base BMS-232632 in high yield. Evaluation of a variety of salts and identification of bisulfate salt 19 with enhanced bioavailability are also described.
Zhongmin Xu - One of the best experts on this subject based on the ideXlab platform.
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process research and development for an efficient synthesis of the hiv protease inhibitor bms 232632
Organic Process Research & Development, 2002Co-Authors: Zhongmin Xu, Michael J Humora, Fernando Quiroz, Thomas P. Kissick, Bharat P. Patel, Janak Singh, Bin Zheng, Mark D. Schwinden, Lin Dong, Dauming HsiehAbstract:Development of an efficient and scalable process for the human immunodeficiency virus (HIV) protease inhibitor BMS-232632 1-[4-(pyridin-2-yl)phenyl]-5(S)-2,5-bis{[N-(methoxycarbonyl)-l-tert-leucinyl]-amino}-4(S)-hydroxy-6-phenyl-2-azahexane, is described. The key step in the synthesis of the intermediate N-1-(tert-butyloxycarbonyl)-N-2-[4-(pyridin-2-yl)benzylidene]hydrazone (11) was the Pd-mediated coupling of boronic acid 9 with 2-bromopyridine. An efficient procedure was developed for the chemoselective reduction of hydrazone 11 to hydrazine carbamate 4. The key intermediate N-(tert-butyloxycarbonyl)-2(S)-amino-1-phenyl-3(R)-3,4-epoxy-butane (6) was prepared stereoselectively from chiral diol 10. The subsequent union of 4 and 6 followed by coupling with N-methoxycarbonyl-l-tert-leucine provided the free base BMS-232632 in high yield. Evaluation of a variety of salts and identification of bisulfate salt 19 with enhanced bioavailability are also described.
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process research and development for an efficient synthesis of the hiv protease inhibitor bms 232632
Organic Process Research & Development, 2002Co-Authors: Zhongmin Xu, Michael J Humora, Fernando Quiroz, Thomas P. Kissick, Bharat P. Patel, Janak Singh, Bin Zheng, Mark D. Schwinden, Lin Dong, Dauming HsiehAbstract:Development of an efficient and scalable process for the human immunodeficiency virus (HIV) protease inhibitor BMS-232632 1-[4-(pyridin-2-yl)phenyl]-5(S)-2,5-bis{[N-(methoxycarbonyl)-l-tert-leucinyl]-amino}-4(S)-hydroxy-6-phenyl-2-azahexane, is described. The key step in the synthesis of the intermediate N-1-(tert-butyloxycarbonyl)-N-2-[4-(pyridin-2-yl)benzylidene]hydrazone (11) was the Pd-mediated coupling of boronic acid 9 with 2-bromopyridine. An efficient procedure was developed for the chemoselective reduction of hydrazone 11 to hydrazine carbamate 4. The key intermediate N-(tert-butyloxycarbonyl)-2(S)-amino-1-phenyl-3(R)-3,4-epoxy-butane (6) was prepared stereoselectively from chiral diol 10. The subsequent union of 4 and 6 followed by coupling with N-methoxycarbonyl-l-tert-leucine provided the free base BMS-232632 in high yield. Evaluation of a variety of salts and identification of bisulfate salt 19 with enhanced bioavailability are also described.
Jinkun Huang - One of the best experts on this subject based on the ideXlab platform.
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synthesis of pyrido fused quinazolinone derivatives via copper catalyzed domino reaction
ChemInform, 2016Co-Authors: Meilin Liu, Miaomiao Shu, Chaochao Yao, Guodong Yin, Dunjia Wang, Jinkun HuangAbstract:The copper-catalyzed reaction of isatins (I) with 2-bromopyridines (II) leads to a variety of pyrido-fused quinazolinones (III).
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synthesis of pyrido fused quinazolinone derivatives via copper catalyzed domino reaction
Organic Letters, 2016Co-Authors: Meilin Liu, Miaomiao Shu, Chaochao Yao, Guodong Yin, Dunjia Wang, Jinkun HuangAbstract:A simple and efficient synthesis of 11H-pyrido[2,1-b]quinazolin-11-ones by Cu(OAc)2·H2O-catalyzed reaction of easily available substituted isatins and 2-bromopyridine derivatives has been developed. The reaction involves C–N/C–C bond cleavage and two C–N bond formations in a one-pot operation. This methodology is complementary to previously reported synthetic procedures, and two plausible reaction mechanisms are discussed.
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Synthesis of Pyrido-Fused Quinazolinone Derivatives via Copper-Catalyzed Domino Reaction
2016Co-Authors: Meilin Liu, Miaomiao Shu, Chaochao Yao, Guodong Yin, Dunjia Wang, Jinkun HuangAbstract:A simple and efficient synthesis of 11H-pyrido[2,1-b]quinazolin-11-ones by Cu(OAc)2·H2O-catalyzed reaction of easily available substituted isatins and 2-bromopyridine derivatives has been developed. The reaction involves C–N/C–C bond cleavage and two C–N bond formations in a one-pot operation. This methodology is complementary to previously reported synthetic procedures, and two plausible reaction mechanisms are discussed
Michael J Humora - One of the best experts on this subject based on the ideXlab platform.
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process research and development for an efficient synthesis of the hiv protease inhibitor bms 232632
Organic Process Research & Development, 2002Co-Authors: Zhongmin Xu, Michael J Humora, Fernando Quiroz, Thomas P. Kissick, Bharat P. Patel, Janak Singh, Bin Zheng, Mark D. Schwinden, Lin Dong, Dauming HsiehAbstract:Development of an efficient and scalable process for the human immunodeficiency virus (HIV) protease inhibitor BMS-232632 1-[4-(pyridin-2-yl)phenyl]-5(S)-2,5-bis{[N-(methoxycarbonyl)-l-tert-leucinyl]-amino}-4(S)-hydroxy-6-phenyl-2-azahexane, is described. The key step in the synthesis of the intermediate N-1-(tert-butyloxycarbonyl)-N-2-[4-(pyridin-2-yl)benzylidene]hydrazone (11) was the Pd-mediated coupling of boronic acid 9 with 2-bromopyridine. An efficient procedure was developed for the chemoselective reduction of hydrazone 11 to hydrazine carbamate 4. The key intermediate N-(tert-butyloxycarbonyl)-2(S)-amino-1-phenyl-3(R)-3,4-epoxy-butane (6) was prepared stereoselectively from chiral diol 10. The subsequent union of 4 and 6 followed by coupling with N-methoxycarbonyl-l-tert-leucine provided the free base BMS-232632 in high yield. Evaluation of a variety of salts and identification of bisulfate salt 19 with enhanced bioavailability are also described.
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process research and development for an efficient synthesis of the hiv protease inhibitor bms 232632
Organic Process Research & Development, 2002Co-Authors: Zhongmin Xu, Michael J Humora, Fernando Quiroz, Thomas P. Kissick, Bharat P. Patel, Janak Singh, Bin Zheng, Mark D. Schwinden, Lin Dong, Dauming HsiehAbstract:Development of an efficient and scalable process for the human immunodeficiency virus (HIV) protease inhibitor BMS-232632 1-[4-(pyridin-2-yl)phenyl]-5(S)-2,5-bis{[N-(methoxycarbonyl)-l-tert-leucinyl]-amino}-4(S)-hydroxy-6-phenyl-2-azahexane, is described. The key step in the synthesis of the intermediate N-1-(tert-butyloxycarbonyl)-N-2-[4-(pyridin-2-yl)benzylidene]hydrazone (11) was the Pd-mediated coupling of boronic acid 9 with 2-bromopyridine. An efficient procedure was developed for the chemoselective reduction of hydrazone 11 to hydrazine carbamate 4. The key intermediate N-(tert-butyloxycarbonyl)-2(S)-amino-1-phenyl-3(R)-3,4-epoxy-butane (6) was prepared stereoselectively from chiral diol 10. The subsequent union of 4 and 6 followed by coupling with N-methoxycarbonyl-l-tert-leucine provided the free base BMS-232632 in high yield. Evaluation of a variety of salts and identification of bisulfate salt 19 with enhanced bioavailability are also described.
Bin Zheng - One of the best experts on this subject based on the ideXlab platform.
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process research and development for an efficient synthesis of the hiv protease inhibitor bms 232632
Organic Process Research & Development, 2002Co-Authors: Zhongmin Xu, Michael J Humora, Fernando Quiroz, Thomas P. Kissick, Bharat P. Patel, Janak Singh, Bin Zheng, Mark D. Schwinden, Lin Dong, Dauming HsiehAbstract:Development of an efficient and scalable process for the human immunodeficiency virus (HIV) protease inhibitor BMS-232632 1-[4-(pyridin-2-yl)phenyl]-5(S)-2,5-bis{[N-(methoxycarbonyl)-l-tert-leucinyl]-amino}-4(S)-hydroxy-6-phenyl-2-azahexane, is described. The key step in the synthesis of the intermediate N-1-(tert-butyloxycarbonyl)-N-2-[4-(pyridin-2-yl)benzylidene]hydrazone (11) was the Pd-mediated coupling of boronic acid 9 with 2-bromopyridine. An efficient procedure was developed for the chemoselective reduction of hydrazone 11 to hydrazine carbamate 4. The key intermediate N-(tert-butyloxycarbonyl)-2(S)-amino-1-phenyl-3(R)-3,4-epoxy-butane (6) was prepared stereoselectively from chiral diol 10. The subsequent union of 4 and 6 followed by coupling with N-methoxycarbonyl-l-tert-leucine provided the free base BMS-232632 in high yield. Evaluation of a variety of salts and identification of bisulfate salt 19 with enhanced bioavailability are also described.
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process research and development for an efficient synthesis of the hiv protease inhibitor bms 232632
Organic Process Research & Development, 2002Co-Authors: Zhongmin Xu, Michael J Humora, Fernando Quiroz, Thomas P. Kissick, Bharat P. Patel, Janak Singh, Bin Zheng, Mark D. Schwinden, Lin Dong, Dauming HsiehAbstract:Development of an efficient and scalable process for the human immunodeficiency virus (HIV) protease inhibitor BMS-232632 1-[4-(pyridin-2-yl)phenyl]-5(S)-2,5-bis{[N-(methoxycarbonyl)-l-tert-leucinyl]-amino}-4(S)-hydroxy-6-phenyl-2-azahexane, is described. The key step in the synthesis of the intermediate N-1-(tert-butyloxycarbonyl)-N-2-[4-(pyridin-2-yl)benzylidene]hydrazone (11) was the Pd-mediated coupling of boronic acid 9 with 2-bromopyridine. An efficient procedure was developed for the chemoselective reduction of hydrazone 11 to hydrazine carbamate 4. The key intermediate N-(tert-butyloxycarbonyl)-2(S)-amino-1-phenyl-3(R)-3,4-epoxy-butane (6) was prepared stereoselectively from chiral diol 10. The subsequent union of 4 and 6 followed by coupling with N-methoxycarbonyl-l-tert-leucine provided the free base BMS-232632 in high yield. Evaluation of a variety of salts and identification of bisulfate salt 19 with enhanced bioavailability are also described.