Asymmetric additions to dichlorophenyldioxane, a new chiral acetal
摘要:
4-(2,6-Dichlorophenyl)-1,3-dioxanes have been reacted with weak nucleophiles and TiCl4 to give benzyl ethers with high selectivity. The major products are consistent with an S(N)2-like mechanism. The benzyl ether is removed in one step using Li/NH3 to give non-racemic secondary alcohols.
Asymmetric additions to dichlorophenyldioxane, a new chiral acetal
摘要:
4-(2,6-Dichlorophenyl)-1,3-dioxanes have been reacted with weak nucleophiles and TiCl4 to give benzyl ethers with high selectivity. The major products are consistent with an S(N)2-like mechanism. The benzyl ether is removed in one step using Li/NH3 to give non-racemic secondary alcohols.