Synthesis of 3-(γ,δ-Disubstituted)allylidene-2-Oxindoles from Isatins by Wittig Reaction with Morita-Baylis-Hillman Bromides
作者:Hye Ran Moon、Ko Hoon Kim、Junseong Lee、Jae Nyoung Kim
DOI:10.1002/bkcs.10053
日期:2015.1
δ‐disubstituted)allylidene‐2‐oxindoles were synthesized by the Wittig reaction between isatins and the phosphorous ylide derived in situ from the Morita–Baylis–Hillman bromides. The 3‐allylidene‐2‐oxindole could be used as an efficient synthetic precursor of 1‐thiacarbazole derivatives. During the conversion of 2‐oxindole moiety to 2‐thiooxindole by Lawesson's reagent, 1‐thiacarbazole derivative was obtained in good
Selective Preparation of Functionalized Dienes from Allylic Phosphonium Salts through the Wittig Reaction
作者:Marcus M. Sá、Lidiane Meier
DOI:10.1002/hc.21104
日期:2013.9
A convenient and general method for the synthesis of stereochemicallydefined dienes from allylic phosphonium salts under simple conditions is described. Selective preparation of trisubstituted dienes was performed with good-to-excellent yields in mild basic aqueous medium. Preparation of 3-deuterated products was also readily achieved when H2O was replaced with D2O as the solvent.