Stereoselective Chlorination of New Type Baylis-Hillman Adducts by bis(Trichloromethyl)carbonate with the Aid of Catalytic Amount of Triphenylphosphine Oxide
作者:Weihui Zhong、Lingjuan Hong、Yemin Zheng
DOI:10.2174/157017810791112469
日期:2010.4.1
The chlorination of the newtype Baylis-Hillman adducts by bis(trichloromethyl)carbonate (BTC) with the aid of catalytic amount of triphenylphosphine oxide (Ph3PO) was achieved with high yields and high stereoselectivities. A plausible mechanism is presented.
A newtype of Baylis–Hillman adducts derived from chlorovinyl aldehydes were prepared via Vilsmeier reaction of ketones with a bis(trichloromethyl) carbonate (BTC)/DMF system to construct chlorovinyl aldehydes, followed by sonochemical Baylis–Hillman reaction under solvent-free conditions. The stereoselective bromination of these new compounds with a Br2-Ph3P system has been achieved efficiently with