Ti(O<i>i</i>-Pr)<sub>4</sub>Mediated Olefination between Julia Reagent and Aldehydes under Mild Conditions: Facile Synthesis of Vinyl Sulfones
作者:Jinjin Yang、Wei Yin、Renhua Liu、Changhu Chu
DOI:10.1002/jccs.201200466
日期:2013.4
A novel Ti(Oi‐Pr)4 mediated olifination between Julia reagent and aldehydes has been developed. By this method, a series of substituted vinylsulfones are prepared under mild conditions, all products are exclusively E isomers. All the structures of these compounds were confirmed by 1H NMR, 13C NMR HRMS and IR.
已开发出一种新的由Ti(O i- Pr)4介导的Julia试剂和醛之间的加脂反应。通过这种方法,可以在温和的条件下制备一系列取代的乙烯基砜,所有产物均为E异构体。这些化合物的所有结构均通过1 H NMR,13 C NMR HRMS和IR确证。
Trisubstituted Highly Activated Benzo[<i>d</i>]thiazol-2-yl-sulfone-Containing Olefins as Building Blocks in Organic Synthesis
作者:Ondřej Kováč、František Zálešák、David J.-Y. D. Bon、Lukas Roiser、Lubomír V. Baar、Mario Waser、Jiří Pospíšil
DOI:10.1021/acs.joc.0c00571
日期:2020.6.5
molecular scaffolds. Synthesis of 1,1-deactivated olefins substituted with a BT-sulfonyl group and a carbonyl or nitrile, respectively, consists of unusual Ti(OPri)4-mediated Knoevenagel-type condensation and proceed in good to excellent yields. Generated olefins can be further transformed in a highly stereoselective manner and in good yields to various polyfunctionalized heterocycles and acyclic molecular