Phosphine catalyzed [3+2] cyclization/Michael addition of allenoate with CS<sub>2</sub> to form 2-thineyl vinyl sulfide
作者:Weihong Fei、Ping Xu、Jie Hou、Weijun Yao
DOI:10.1039/d0cc05070a
日期:——
have developed a DPPE-catalyzed three molecular two component tandem reaction of γ-substituted allenoate and CS2 to construct 2-thineyl vinyl sulfide through phosphine catalyzed [3+2] cyclization followed by Michaeladdition. The synthetic value of the 2-thineyl vinyl sulfide was demonstrated by a concise synthesis of an anti-glaucoma agent.
Synthesis of 2-Alkynoates by Palladium(II)-Catalyzed Oxidative Carbonylation of Terminal Alkynes and Alcohols
作者:Qun Cao、N. Louise Hughes、Mark J. Muldoon
DOI:10.1002/chem.201602558
日期:2016.8.16
PdII catalyst, utilizing a simple and inexpensive amine ligand (TMEDA), allows 2‐alkynoates to be prepared in high yields by an oxidativecarbonylation of terminal alkynes and alcohols. The catalyst system overcomes many of the limitations of previous palladiumcarbonylation catalysts. It has an increased substrate scope, avoids large excesses of alcohol substrate and uses a desirable solvent. The catalyst
Organocatalytic Alkyne Isomerizations under Flow Conditions Using Heterogeneous Bifunctional Polystyrene Bearing Phosphine and Phenol Groups
作者:Andreas Kirschning、Patrick Toy、Sascha Ceylan、Henry Law
DOI:10.1055/s-0036-1588589
日期:——
polymer bearing phosphine and phenol groups was developed to catalyze the isomerization of electronically activated alkynes. This organocatalytic process provided the corresponding (E,E)-dienes and was shown to work under both batch and flow conditions. A heterogeneous bifunctional polymer bearing phosphine and phenol groups was developed to catalyze the isomerization of electronically activated alkynes