Syntheses of ( Z )-allyl chlorides from Baylis–Hillman adducts with a trichlorotriazine/DMF system

Stereoselective transformation of Baylis-Hillman adducts 1 into corresponding (Z)-allyl chlorides 2 have been achieved by treatment with 2,4,6-trichloro [1,3,5]triazine and N, N-dimethyl formamide. This novel approach proceeds readily at room temperature within a few hours with excellent yields and stereoselectivity.