Cross-dehydrogenative coupling strategy for phosphonation and cyanation of secondary N-alkyl anilines by employing 2,3-dichloro-5,6-dicyanobenzoquinone
has been developed firstly under mild reaction conditions. Based on detailed optimization of reaction conditions, the substrate generality of N-alkyl anilines and various hydrogen phosphonates has been investigated, and a series of versatile α-aminophosphonates and α-aminonitriles were therefore furnished in good to excellent yields. A plausible collective reaction mechanism through dehydrogenation to
Highly Regioselective Synthesis of Substituted Pyrroles Utilizing Low-Valent Titanium Reagent
作者:Daqing Shi、Guolan Dou、Chunling Shi、Zhengyi Li、Shun-Jun Ji
DOI:10.1055/s-2007-990787
日期:2007.10
A short and efficientsynthesis of substituted pyrroles was accomplished in good yields via the novel coupling cyclization reaction of 1,3-diketones with imines promoted by low-valenttitaniumreagent. High regioselectivity was achieved and the structures of two of the products were confirmed by X-ray diffraction studies.
通过低价钛试剂促进的 1,3-二酮与亚胺的新型偶联环化反应,以良好的收率完成了取代吡咯的短而有效的合成。实现了高区域选择性,并且通过 X 射线衍射研究证实了两种产物的结构。
An asymmetric alkynylation/hydrothiolation cascade: an enantioselective synthesis of thiazolidine-2-imines from imines, acetylenes and isothiocyanates
作者:Alok Ranjan、Anupam Mandal、Swapnil G. Yerande、Dattatraya H. Dethe
DOI:10.1039/c5cc05549k
日期:——
Multicomponent reaction amongst imine, terminal alkyne, and isothiocyanate in presence of catalytic chiral copper-pybox complex proceedes enantioselectively to give enantiopure thiazolidine-2-imine (60-99% ee) by highly regioselective intramolecular 5-exo-dig hydrothiolation reaction.
Parallel Synthesis of Strongly Fluorescent Tetraaryl-4,5-dihydro-1,2,4-triazoles via 1,3-Dipolar Cycloaddition on Soluble Polymer Support
作者:Yan-Guang Wang、Wang-Ge Shou、Yun-Yun Yang
DOI:10.1055/s-2005-918430
日期:——
An efficient liquid-phase synthesis of strongly fluorescent tetraaryl-4,5-dihydro-1,2,4-triazoles via 1,3-dipolar cycloaddition of imines with nitrile imines generated in situ on soluble polymer support is described.