作者:Emily R. T. Robinson、Charlene Fallan、Carmen Simal、Alexandra M. Z. Slawin、Andrew D. Smith
DOI:10.1039/c3sc50199j
日期:——
The asymmetric annulation of a range of α,β-unsaturated acyl ammonium intermediates, formed from isothiourea HBTM 2.1 and anhydrides with either 1,3-dicarbonyls, β-ketoesters or azaaryl ketones gives either functionalised esters (upon ring opening), dihydropyranones or dihydropyridones in good yields (up to 93%) and high enantioselectivity (up to 97% ee).
Esters of the 3-(2-furyl)-2-propenoic acid with diols
申请人:Basell Poliolefine Italia S.p.A.
公开号:EP1216999A1
公开(公告)日:2002-06-26
Esters of 3-(2-furyl)-2-propenoic acid with diols having the general formula A2X, in which A is a 3-(2-furyl)-2-propenoate group and X is a C1-C6 alkylene group.
The said esters are used as crosslinking agents in processes for crosslinking polymers.
Esters of 3-(2-furyl)-2-propenoic acid with diols having the general formula A
2
X, in which A is a 3-(2-furyl)-2-propenoate group and X is a C
1
-C
6
alkylene group.
The said esters are used as crosslinking agents in processes for crosslinking polymers.
3-(2-呋喃基)-2-丙烯酸与通式为 A 的二元醇的酯类
2
X,其中 A 是 3-(2-呋喃基)-2-丙烯酸酯基团,X 是 C
1
-C
6
烯基。
上述酯类可在聚合物交联过程中用作交联剂。
Enantioselective Synthesis in Continuous Flow: Polymer-Supported Isothiourea-Catalyzed Enantioselective Michael Addition–Cyclization with α-Azol-2-ylacetophenones
作者:Zhanyu Zhou、Kevin Kasten、Tengfei Kang、David B. Cordes、Andrew D. Smith
DOI:10.1021/acs.oprd.4c00113
日期:2024.5.17
incorporating a polymer-supported isothiourea HyperBTM catalyst derivative has been used to promote the enantioselective synthesis of a range of heterocyclic products derived from α-azol-2-ylacetophenones and -acetamides combined with alkyl, aryl, and heterocyclicα,β-unsaturated homoanhydrides in continuous flow via an α,β-unsaturated acyl-ammonium intermediate. The products are generated in good to