Deuterium-isotope study on the reductive ring opening of benzylidene acetals
作者:I-Chi Lee、Medel Manuel L. Zulueta、Chi-Rung Shie、Susan D. Arco、Shang-Cheng Hung
DOI:10.1039/c1ob06056b
日期:——
were prepared to probe the stereoselectivity of the reductiveringopening of carbohydrate-based benzylidene-type acetals. AlD3 revealed a retentive stereoselectivity probably through the rare SNi (internal nucleophilic substitution) mechanism. An SN1-like mechanism occurs in the acid-promoted regioselective BD3·THF- or Et3SiD-reductive ringopening.
制备了特定的氘代参比化合物以探测基于碳水化合物的亚苄基型乙缩醛的还原性开环的立体选择性。AlD 3可能通过罕见的S N i(内部亲核取代)机制显示出保持性立体选择性。在酸促进的区域选择性BD 3 ·THF-或Et 3 SiD-还原性开环中发生类似S N 1的机制。