The Experts below are selected from a list of 1704 Experts worldwide ranked by ideXlab platform
Chaoguo Yan - One of the best experts on this subject based on the ideXlab platform.
-
diastereoselective synthesis of functionalized spiro cyclopropane 1 3 Indolines and spiro indoline 3 1 cyclopropane 2 3 Indolines
Tetrahedron, 2016Co-Authors: Ying Han, Chaoguo YanAbstract:In the presence of hexamethylphosphorous triamide, the reaction of isatin with arylidene pivaloylacetonitriles in dry methylene dichloride afforded functionalized spiro[cyclopropane-1,3′-Indolines] in good yields and with high diastereoselectivity. Moreover, the similar reaction of isatins with isatylidene malononitriles predominately gave spiro[indoline-3,1′-cyclopropane-2′,3″-Indolines] in very high yields with two indoline moieties in trans-configuration.
-
diastereoselective synthesis of spiro benzo d pyrrolo 2 1 b thiazole 3 3 Indolines via cycloaddition reaction of n phenacylbenzothiazolium bromides and 3 methyleneoxindoles
Organic and Biomolecular Chemistry, 2015Co-Authors: Guoliang Shen, Jing Sun, Chaoguo YanAbstract:The domino cycloaddition reactions of N-phenacylbenzothiazolium bromides with 3-phenacylideneoxindoles or ethyl 2-(2-oxoindolin-3-ylidene)acetates in ethanol at room temperature in the presence of triethylamine as a base afforded functionalized spiro[benzo[d]pyrrolo[2,1-b]thiazole-3,3′-Indolines] in good yields and with high diastereoselectivity. The similar reactions of N-phenacylthiazolium bromides with 3-phenacylideneoxindoles resulted in the corresponding functionalized spiro[indoline-3,7′-pyrrolo[2,1-b]thiazoles] in satisfactory yields and also with high diastereoselectivity.
-
convenient synthesis of functionalized spiro indoline 3 2 pyrrolizines or spiro indoline 3 3 pyrrolidines via multicomponent reactions
Organic and Biomolecular Chemistry, 2015Co-Authors: Jing Sun, Hui Gong, Liang Chen, Chaoguo YanAbstract:A general and practical route for the in situ generation of a new type of azomethine ylide and its sequential 1,3-dipolar cycloaddition reaction was successfully established. The three-component reaction of secondary α-amino acids including proline, sarcosine, thiazolidine-4-carboxylic acid with dialkyl acetylenedicarboxylate and 3-methyleneoxindoles in refluxing ethanol afforded the functionalized spiro[indoline-3,2′-pyrrolizines], spiro[indoline-3,3′-pyrrolidines] and spiro[indoline-3,6′-pyrrolo[1,2-c]thiazoles] in good yields and with high diastereoselectivity. Furthermore, similar multicomponent reactions using primary α-amino acids such as glycine, alanine and phenylalanine resulted in the corresponding (spiro[indoline-3,3′-pyrrolidine]-1′-yl)maleates.
-
Synthesis of functionalized spiro[indoline-3,4’-pyridines] and spiro[indoline-3,4’-pyridinones] via one-pot four-component reactions
Beilstein-Institut, 2013Co-Authors: Li-juan Zhang, Jing Sun, Chaoguo YanAbstract:In the presence of triethylamine as catalyst, the one-pot four-component reactions of arylamines, methyl propiolate, isatin and malononitrile afforded the functionalized spiro[indoline-3,4’-pyridine] derivatives in good yields. Similar reactions with ethyl cyanoacetate successfully afforded the functionalized spiro[indoline-3,4’-pyridines] and spiro[indoline-3,4’-pyridinones] as the main products according to the structures of the arylamines and other primary amines
Yian Shi - One of the best experts on this subject based on the ideXlab platform.
-
a facile approach to spirocyclic 2 azido Indolines via azidation of indoles with ceric ammonium nitrate
ChemInform, 2015Co-Authors: Mao Liu, Yian Shi, Hua TianAbstract:The oxidative azidation of indoles (I), (IV), and (VI) leads to desired spirocyclic 2-azido Indolines.
-
a facile approach to spirocyclic 2 azido Indolines via azidation of indoles with ceric ammonium nitrate
Organic and Biomolecular Chemistry, 2014Co-Authors: Mao Liu, Yian Shi, Hua TianAbstract:This paper describes azidation of indoles with NaN3 and ceric ammonium nitrate (CAN), giving a variety of spirocyclic 2-azido Indolines in good yields and moderate diastereoselectivities.
-
palladium 0 catalyzed heck reaction c h activation amination sequence with diaziridinone a facile approach to Indolines
Angewandte Chemie, 2014Co-Authors: Huaiji Zheng, Yingguang Zhu, Yian ShiAbstract:Indolines are important moieties present in various biologically significant molecules and have attracted considerable attention in synthetic chemistry. This paper describes a Heck reaction/CH activation/amination sequence for forming Indolines using di-tert-butyldiaziridinone. The reaction process likely proceeds via a pallada(II)cycle, which is converted into an indoline by oxidative addition to the diaziridinone and two subsequent CN bond formations.
Hidetoshi Miura - One of the best experts on this subject based on the ideXlab platform.
-
Substituent effects in a double rhodanine indoline dye on performance of zinc oxide dye-sensitized solar cell
Dyes and Pigments, 2010Co-Authors: Masaki Matsui, Kazumasa Funabiki, Yasuhiro Kubota, Tomoki Fujita, Tsukasa Yoshida, Hidetoshi MiuraAbstract:Abstract The solar-light-to-electricity conversion efficiency of substituted indoline dyes depended on short-circuit photocurrent density which is affected by maximum incident photon-to-current efficiency. The oxidation potential of the double rhodanine indoline dyes needed to be >∼0.2 V vs Fc/Fc + in acetonitrile to show high incident photon-to-current efficiency in a zinc oxide, dye-sensitized solar cell. To make a molecular design of highly efficient indoline dyes, the HOMO energy level should be more negative than ∼−4.9 eV by the DFT calculations.
-
Highly efficient substituted triple rhodanine indoline dyes in zinc oxide dye-sensitized solar cell
Tetrahedron, 2010Co-Authors: Masaki Matsui, Kazumasa Funabiki, Yasuhiro Kubota, Tsukasa Yoshida, Yoshinori Asamura, Jiye Jin, Hidetoshi MiuraAbstract:Substituited triple rhodanine indoline dyes showed higher performance than known triple rhodanine derivative (D150). A few triple rhodanine indoline derivatives showed comparable conversion efficiency to D149.
Jing Sun - One of the best experts on this subject based on the ideXlab platform.
-
diastereoselective synthesis of spiro benzo d pyrrolo 2 1 b thiazole 3 3 Indolines via cycloaddition reaction of n phenacylbenzothiazolium bromides and 3 methyleneoxindoles
Organic and Biomolecular Chemistry, 2015Co-Authors: Guoliang Shen, Jing Sun, Chaoguo YanAbstract:The domino cycloaddition reactions of N-phenacylbenzothiazolium bromides with 3-phenacylideneoxindoles or ethyl 2-(2-oxoindolin-3-ylidene)acetates in ethanol at room temperature in the presence of triethylamine as a base afforded functionalized spiro[benzo[d]pyrrolo[2,1-b]thiazole-3,3′-Indolines] in good yields and with high diastereoselectivity. The similar reactions of N-phenacylthiazolium bromides with 3-phenacylideneoxindoles resulted in the corresponding functionalized spiro[indoline-3,7′-pyrrolo[2,1-b]thiazoles] in satisfactory yields and also with high diastereoselectivity.
-
convenient synthesis of functionalized spiro indoline 3 2 pyrrolizines or spiro indoline 3 3 pyrrolidines via multicomponent reactions
Organic and Biomolecular Chemistry, 2015Co-Authors: Jing Sun, Hui Gong, Liang Chen, Chaoguo YanAbstract:A general and practical route for the in situ generation of a new type of azomethine ylide and its sequential 1,3-dipolar cycloaddition reaction was successfully established. The three-component reaction of secondary α-amino acids including proline, sarcosine, thiazolidine-4-carboxylic acid with dialkyl acetylenedicarboxylate and 3-methyleneoxindoles in refluxing ethanol afforded the functionalized spiro[indoline-3,2′-pyrrolizines], spiro[indoline-3,3′-pyrrolidines] and spiro[indoline-3,6′-pyrrolo[1,2-c]thiazoles] in good yields and with high diastereoselectivity. Furthermore, similar multicomponent reactions using primary α-amino acids such as glycine, alanine and phenylalanine resulted in the corresponding (spiro[indoline-3,3′-pyrrolidine]-1′-yl)maleates.
-
Synthesis of functionalized spiro[indoline-3,4’-pyridines] and spiro[indoline-3,4’-pyridinones] via one-pot four-component reactions
Beilstein-Institut, 2013Co-Authors: Li-juan Zhang, Jing Sun, Chaoguo YanAbstract:In the presence of triethylamine as catalyst, the one-pot four-component reactions of arylamines, methyl propiolate, isatin and malononitrile afforded the functionalized spiro[indoline-3,4’-pyridine] derivatives in good yields. Similar reactions with ethyl cyanoacetate successfully afforded the functionalized spiro[indoline-3,4’-pyridines] and spiro[indoline-3,4’-pyridinones] as the main products according to the structures of the arylamines and other primary amines
Masaki Matsui - One of the best experts on this subject based on the ideXlab platform.
-
Substituent effects in a double rhodanine indoline dye on performance of zinc oxide dye-sensitized solar cell
Dyes and Pigments, 2010Co-Authors: Masaki Matsui, Kazumasa Funabiki, Yasuhiro Kubota, Tomoki Fujita, Tsukasa Yoshida, Hidetoshi MiuraAbstract:Abstract The solar-light-to-electricity conversion efficiency of substituted indoline dyes depended on short-circuit photocurrent density which is affected by maximum incident photon-to-current efficiency. The oxidation potential of the double rhodanine indoline dyes needed to be >∼0.2 V vs Fc/Fc + in acetonitrile to show high incident photon-to-current efficiency in a zinc oxide, dye-sensitized solar cell. To make a molecular design of highly efficient indoline dyes, the HOMO energy level should be more negative than ∼−4.9 eV by the DFT calculations.
-
Highly efficient substituted triple rhodanine indoline dyes in zinc oxide dye-sensitized solar cell
Tetrahedron, 2010Co-Authors: Masaki Matsui, Kazumasa Funabiki, Yasuhiro Kubota, Tsukasa Yoshida, Yoshinori Asamura, Jiye Jin, Hidetoshi MiuraAbstract:Substituited triple rhodanine indoline dyes showed higher performance than known triple rhodanine derivative (D150). A few triple rhodanine indoline derivatives showed comparable conversion efficiency to D149.