The allenyl titanium 11a, prepared using Yamamoto's conditions reacted with different aldehydes 12a-c to produce the anti acetylenic diols 13a-c. In a synthetic approach to erigerol 1 this reaction was applied to the aldehyde 4 and thr expected key intermediate 13d was obtained in 40% yield after removal of the THP group. During this study the α-alkoxypropargylstannane 14 and the α-alkoxyallenylstannane
使用山本的条件制备的烯丙基
钛11a与不同的醛12a-c反应以产生抗炔二醇13a-c。以合成方法制备的
香叶醇1,该反应被应用于醛4,并在除去THP基团后以40%的产率获得了预期的关键中间体13d。在这项研究过程中,在用Ti(O i Pr)对相应的
硫代衍
生物5b和7b进行
金属化后,以高收率制备了α-烷氧基炔丙基
锡烷14和α-烷氧基烯丙基
锡烷154或Et 2 ZnCl。