Access to Polysubstituted Halophosphorylated Dihydrofurans via Halotrimethylsilane-Promoted Cascade Cyclization of γ-Hydroxyl Ynones with Diphenylphosphine Oxides
of practical polysubstituted halophosphorylated dihydrofuran derivatives. It is noteworthy that halotrimethylsilane functions as a halogenation reagent as well as a promoter to initiate this transformation. In addition, the reaction system can also be scaled up to gram quantities, and the produced halogenated compounds can undergo further derivatizations by Pd-catalyzed coupling reactions.
Novel copper(I) chloride-assisted coupling reaction of 1-chloro-1-aryloyl-3,3-diarylallene to afford 3,7-dioxa-2,6-diaryl-4,8-bis(diarylmethylene)bicyclo[3.3.O]octa-1,5-diene and 1,1,4,4-tetraaryl-3,6-diaryloylhexa-1,2-diene-5-yne, and thermal cyclization of the latter to a fulvene
A novel CuCl-assisted couplingreaction of 1-chloro-1-aryloyl-3,3-diarylallene () and two new thermal cyclizationreactions of 1,1,4,4-tetraaryl-3,6-diaryloylhexa-1,2-diene-5-yne () are described.
Synthesis of 3(2<i>H</i>)-furanone derivatives: <i>p</i>-TsOH/halotrimethylsilane promoted cycloketonization of <i>γ</i>-hydroxyl ynones
作者:Yi-Feng Qiu、Jian-He Cao、Shutao Wang、Qiang Wang、Ming Li、Jun-Jiao Wang、Zheng-Jun Quan、Xi-Cun Wang
DOI:10.1039/d3ob01500a
日期:——
A p-TsOH/halotrimethylsilane facilitated cycloketonization of γ-hydroxyl ynones is detailed. This methodology enables the one-step synthesis of polysubstituted 3(2H)-furanone products. It is remarkable that the reaction exhibits excellent regio- and chemoselectivity by the addition of very small quantities of p-toluenesulfonic acid and water.
详细描述了对-TsOH /卤代三甲基硅烷促进γ-羟基炔酮的环酮化。该方法能够一步合成多取代的 3(2 H )-呋喃酮产品。值得注意的是,通过添加极少量的对甲苯磺酸和水,该反应表现出优异的区域选择性和化学选择性。
TODA, FUMIO;YAMAMOTO, MASATAKA;TANAKA, KOICHI;MAK, TH. C. W., TETRAHEDRON LETT., 1985, 26, N 5, 631-634
作者:TODA, FUMIO、YAMAMOTO, MASATAKA、TANAKA, KOICHI、MAK, TH. C. W.