The Cram/anti-Cram selectivity in the reactions of allylmetals with aldehydes and the erythro/threo selectivity in the reactions of substituted allylic organometallic compounds with other aldehydes can be controlled by the metal (M). Based on both selectivities, we can predict the diastereofacial selectivity of more complex systems. Finally, 1-O-methyl-2,6-dideoxyhexose and 1-O,3-O-dimethyl-4,6-dideoxyhexose
烯丙基
金属与醛的反应中的Cram / anti-Cram选择性和取代的烯丙基有机
金属化合物与其他醛的反应中的赤/苏选择性可以通过
金属(M)控制。基于这两种选择性,我们可以预测更复杂系统的非对面选择性。最后,制备1-O-甲基-2,6-二脱氧己糖和1-O,3-O-二甲基-4,6-二脱氧己糖。