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Items: 1 to 20 of 162

1.

Cinchona alkaloid derivative-catalyzed enantioselective synthesis via a Mannich-type reaction and antifungal activity of β-amino esters bearing benzoheterocycle moieties.

Xiao H, Wu F, Shi L, Chen Z, Su S, Tang C, Wang H, Li Z, Li M, Shi Q.

Molecules. 2014 Apr 1;19(4):3955-72. doi: 10.3390/molecules19043955.

2.

Chiral cinchona alkaloid-derived thiourea catalyst for enantioselective synthesis of novel β-amino esters by Mannich reaction.

Li W, Song B, Bhadury PS, Li L, Wang Z, Zhang X, Hu D, Chen Z, Zhang Y, Bai S, Wu J, Yang S.

Chirality. 2012 Mar;24(3):223-31. doi: 10.1002/chir.21986. Epub 2012 Jan 25.

PMID:
22278809
3.

Enantioselective Michael addition of 3-aryloxindoles to a vinyl bisphosphonate ester catalyzed by a cinchona alkaloid derived thiourea catalyst.

Zhao MX, Dai TL, Liu R, Wei DK, Zhou H, Ji FH, Shi M.

Org Biomol Chem. 2012 Oct 21;10(39):7970-9.

PMID:
22941464
4.

One-pot synthesis of novel chiral β-amino acid derivatives by enantioselective Mannich reactions catalyzed by squaramide cinchona alkaloids.

Zhang K, Liang X, He M, Wu J, Zhang Y, Xue W, Jin L, Yang S, Hu D.

Molecules. 2013 May 23;18(6):6142-52. doi: 10.3390/molecules18066142.

5.

Asymmetric 1,4-addition of oxazolones to nitroalkenes by bifunctional cinchona alkaloid thiourea organocatalysts: synthesis of alpha,alpha-disubstituted alpha-amino acids.

Alemán J, Milelli A, Cabrera S, Reyes E, Jørgensen KA.

Chemistry. 2008;14(35):10958-66. doi: 10.1002/chem.200802030.

PMID:
18979472
6.

Highly enantioselective nitro-Mannich reaction catalyzed by cinchona alkaloids and N-benzotriazole derived ammonium salts.

Wei Y, He W, Liu Y, Liu P, Zhang S.

Org Lett. 2012 Feb 3;14(3):704-7. doi: 10.1021/ol203170x. Epub 2012 Jan 18.

PMID:
22257269
7.

Diastereo- and enantioselective nitro-Mannich reaction of α-substituted nitroacetates to N-phosphoryl imines catalyzed by cinchona alkaloid thiourea organocatalysts.

Fan W, Kong S, Cai Y, Wu G, Miao Z.

Org Biomol Chem. 2013 May 21;11(19):3223-9. doi: 10.1039/c3ob40335a. Epub 2013 Apr 12.

PMID:
23584159
9.
10.

Asymmetric Mannich reactions of beta-keto esters with acyl imines catalyzed by cinchona alkaloids.

Lou S, Taoka BM, Ting A, Schaus SE.

J Am Chem Soc. 2005 Aug 17;127(32):11256-7.

PMID:
16089450
11.

A cinchona alkaloid catalyzed enantioselective sulfa-Michael/aldol cascade reaction of isoindigos: construction of chiral bispirooxindole tetrahydrothiophenes with vicinal quaternary spirocenters.

Gui YY, Yang J, Qi LW, Wang X, Tian F, Li XN, Peng L, Wang LX.

Org Biomol Chem. 2015 Jun 14;13(22):6371-9. doi: 10.1039/c5ob00774g.

PMID:
25974840
12.

Asymmetric direct α-hydroxylation of β-oxo esters catalyzed by chiral quaternary ammonium salts derived from cinchona alkaloids.

Yao H, Lian M, Li Z, Wang Y, Meng Q.

J Org Chem. 2012 Nov 2;77(21):9601-8. doi: 10.1021/jo3016242. Epub 2012 Oct 18.

PMID:
23050841
13.

Highly enantioselective Michael addition of 2-oxindoles to vinyl selenone in RTILs catalyzed by a Cinchona alkaloid-based thiourea.

Zhang T, Cheng L, Hameed S, Liu L, Wang D, Chen YJ.

Chem Commun (Camb). 2011 Jun 21;47(23):6644-6.

PMID:
21776615
14.

Highly enantioselective γ-amination of α,β-unsaturated acyl chlorides with azodicarboxylates: efficient synthesis of chiral γ-amino acid derivatives.

Shen LT, Sun LH, Ye S.

J Am Chem Soc. 2011 Oct 12;133(40):15894-7. doi: 10.1021/ja206819y. Epub 2011 Sep 15.

PMID:
21902208
15.

Organocatalytic asymmetric Michael-type reaction between β,γ-unsaturated α-keto ester and α-nitro ketone.

Li P, Chan SH, Chan AS, Kwong FY.

Org Biomol Chem. 2011 Dec 7;9(23):7997-9. doi: 10.1039/c1ob06191g. Epub 2011 Oct 3.

PMID:
21969174
16.

Highly enantioselective conjugate addition of nitromethane to chalcones using bifunctional cinchona organocatalysts.

Vakulya B, Varga S, Csámpai A, Soós T.

Org Lett. 2005 May 12;7(10):1967-9.

PMID:
15876031
17.

Direct asymmetric anti-Mannich-type reactions catalyzed by cinchona alkaloid derivatives.

Jin Y, Chen D, Zhang XR.

Chirality. 2014 Dec;26(12):801-5. doi: 10.1002/chir.22358. Epub 2014 Jul 18.

PMID:
25043407
18.

Enantioselective and regioselective organocatalytic conjugate addition of malonates to nitroenynes.

Li XJ, Peng FZ, Li X, Wu WT, Sun ZW, Li YM, Zhang SX, Shao ZH.

Chem Asian J. 2011 Jan 3;6(1):220-5. doi: 10.1002/asia.201000561.

PMID:
21077095
19.

Bifunctional Cinchona alkaloid thiourea catalyzed highly efficient, enantioselective aza-Henry reaction of cyclic trifluoromethyl ketimines: synthesis of anti-HIV drug DPC 083.

Xie H, Zhang Y, Zhang S, Chen X, Wang W.

Angew Chem Int Ed Engl. 2011 Dec 2;50(49):11773-6. doi: 10.1002/anie.201105970. Epub 2011 Oct 11. No abstract available.

PMID:
21989976
20.

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