Synthesis of Highly Substituted Racemic and Enantioenriched Allenylsilanes via Copper-Catalyzed Hydrosilylation of (Z)‑2-Alken-4-ynoates with Silylboronate
journal contributionposted on 02.12.2015, 00:00 by Min Wang, Zheng-Li Liu, Xiang Zhang, Pan-Pan Tian, Yun-He Xu, Teck-Peng Loh
Copper-catalyzed highly efficient hydrosilylation reaction of enynoates was developed. Under simple reaction conditions, various di-, tri-, and tetrasubstituted racemic allene products could be obtained in high yields. The asymmetric 1,6-addition of silyl group to the (Z)-2-alken-4-ynoates could be achieved under mild reaction conditions to afford the silyl-substituted enantioenriched chiral allene products in good yields and with high enantioselectivities.