p-CHOC(6)H(4)) undergo Suzuki-type three-component assembling with 1,1-dimethylallene to give the corresponding allylic derivatives, (CH(3))(2)=CRCH(2)Ar, in DMF at 70 degrees C in the presence of CsF using Pd(dba)(2) as the catalyst. Higher yields of products were obtained for aryliodides than for the corresponding aryl bromides and chlorides. This three-component assembling is highly regioselective
Novel coupling of dithioacetals with Grignard reagents
作者:Zhi-Jie Ni、Tien-Yau Luh
DOI:10.1039/c39870001515
日期:——
Dithioacetals react with Grignardreagents in the presence of a catalytic amount of [NiCl2(PPh3)2] to give the corresponding olefinic coupling products in good yields; a mechanism for the reaction is suggested.
Di-,tri-,tetrasubstituted β-hydroxysulfides readily prepared from α-thioalkyllithiums and carbonyl compounds are easily transformed to di- and trisubstituted olefins on reaction with P2I4 or PI3, and to tetrasubstituted ones with SOCl2.
由α-硫代烷基锂和羰基化合物容易制得的二,三,四取代的β-羟基硫化物在与P 2 I 4或PI 3反应后易于转化为二和三取代的烯烃,并与SOCl 2转化为四取代的烯烃。
Stereospecific introduction of double bounds via thermolysis of .beta.-lactones
作者:Waldemar Adam、Jaime Baeza、Ju-Chao Liu
DOI:10.1021/ja00761a036
日期:1972.3
Hoppe,I.; Schoellkopf,U., Liebigs Annalen der Chemie, 1979, # 2, p. 219 - 226