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