Cross-coupling of 2-chlorobenzoxazole with β,γ -unsaturated grignard reagents: regioselective synthesis of 2-allyl-, 2-allenyl-, and 2-propargyl-benzoxazoles
作者:Francesco Babudri、Saverio Florio、Ludovico Ronzini
DOI:10.1016/s0040-4020(01)87545-1
日期:1986.1
β,γ-unsaturated Grignard reagents react regioselectively with 2-chlorobenzoxazole to give high to excellent yields of 2-allyl-, 2-allenyl-, and 2-propargyl-benzoxazoles. Reduction of 2-allylbenzoxazoles leads to quantitative yields of branched 2-alkylbenzoxazoles.
β,γ-不饱和格氏试剂与2-氯苯并恶唑在区域上选择性反应,从而获得高至优异的2-烯丙基-,2-烯基-和2-炔丙基-苯并恶唑的收率。2-烯丙基苯并恶唑的还原导致支链2-烷基苯并恶唑的定量收率。