Herein we disclose an iron-catalyzed cross-coupling reaction of propargyl ethers with Grignard reagents. The was demonstrated to be stereospecific and allows for a facile preparation optically active allenes via efficient chirality transfer. Various tri- tetrasubstituted fluoroalkyl can obtained in good excellent yields. In addition, reagents α-alkynyl oxetanes tetrahydrofurans is disclosed her...

Catalytic amount of Ce(IV) as ceric triethylammonium nitrate (CTEAN) in dichloromethane or acetone can bring about an efficient tetrahydropyranylation of different types of alcohols to afford the corrsesponding tetrahydropyranyl ethers in high yields. Deportection of tetrahydropyranyl ethers can also be achieved efficiently in the presence of this catalyst in methanol.

catalytic amount of ce(iv) as ceric triethylammonium nitrate (ctean) in dichloromethane or acetone can bring about an efficient tetrahydropyranylation of different types of alcohols to afford the corrsesponding tetrahydropyranyl ethers in high yields. deportection of tetrahydropyranyl ethers can also be achieved efficiently in the presence of this catalyst in methanol.