Pd-catalyzed cycloisomerization–allylation of 4-alkynones: synthesis of 5-homoallylfuran derivatives
摘要:
In the presence of Pd-2(dba)(3)-fBu(3)P catalyst and Cs2CO3, cycloisomerization-allylation reactions of 4-alkynone derivatives with allyl carbonates in MeCN proceed in 5-exo mode to give highly-substituted furans having homoallyl groups at 5-position. (C) 2011 Elsevier Ltd. All rights reserved.