Stereoselective thia-Michael 1,4-Addition to Acyclic 2,4-Dienones and 2-En-4-ynones
作者:Rafał Kowalczyk、Przemysław J. Boratyński
DOI:10.1002/adsc.201501138
日期:2016.4.14
AbstractOrganocatalyzed highly stereoselective 1,4‐thia‐Michael addition of mercaptans to linear 2,4‐dienones and 2‐en‐4‐ynones was developed using Cinchona alkaloid‐based squaramides. Application of only 0.5–1 mol % loading afforded products in up to 98:2 e.r. and above 99:1 after a single recrystallization. The adducts of allyl mercaptan can be conveniently further transformed to new chiral 2‐substituted 2,5‐dihydrothiophenes by ring‐closing metathesis.magnified image
Über die Reaktionen von Guanidin bzw. Thioharnstoff mit α,β,γ,δ-ungesättigten Ketonen
WENDELIN, W.;SCHRAMM, H. -W.;BLASI-RABASSA, A., MONATSH. CHEM., 1985, 116, N 3, 385-400
作者:WENDELIN, W.、SCHRAMM, H. -W.、BLASI-RABASSA, A.
DOI:——
日期:——
A Convenient Regiospecific Synthesis of New Conjugated Tetrazole Derivatives via the Reaction of Dienones with the Tetrachlorosilane-Sodium Azide Reagent and their NMR Structural Assignment
作者:Tarek A. Salama、Abdel-Aziz S. El-Ahl、Abdel-Galil M. Khalil、Margret M. Girges、Bernd Lackner、Christian Steindl、Saad S. Elmorsy
DOI:10.1007/s00706-003-0045-x
日期:2003.9.1
facile one step reaction of dienones with a combination of tetrachlorosilane and sodium azide in acetonitrile under mild conditions. A complete structure assignment of three representative examples of the tetrazoles was achieved by advanced 2D NMR measurements including COSY, TOCSY, HSQC, HMBC, N O ESY, and R O ESY experiments.
几种新的1-芳基- ,芳烷基- ,和杂芳基-5-(4-苯-1,3-二烯基)四唑衍生物和稠四唑衍生物是有效地和区域专一性几乎定量产率制备 经由 二烯酮与一个浅显一步反应在温和的条件下将四氯硅烷和叠氮化钠在乙腈中混合使用。的四唑的三种具有代表性的实施例的完整结构分配通过先进的2D NMR测量包括COSY,TOCSY,HSQC,HMBC,N实现 Ó ESY和R ö ESY实验。
Synthesis, Identification and Study of the Anti-microbial Activity of Novel Chalcone and Epoxy Chalcone Compounds