2-allyl-2-(2-methylallyloxy)pent-4-enal 在
chiral tridentate Schiff base ligand-chromium(III) complex 4 A molecular sieve 作用下,
以
甲苯 为溶剂,
生成
(3R)-2,2-diallyl-3-hydroxy-5-methylene-tetrahydro-2H-pyran 、 (3S)-2,2-diallyl-3-hydroxy-5-methylene-tetrahydro-2H-pyran