OMS-2 for Aerobic, Catalytic, One-pot Alcohol Oxidation-Wittig Reactions: Efficient Access to α,β-Unsaturated Esters
作者:Jagadeswara R. Kona、Cecil K. King'ondu、Amy R. Howell、Steven L. Suib
DOI:10.1002/cctc.201300942
日期:2014.3
found to be highly active for obtaining α,β‐unsaturated esters (up to 95 % yield and with high diastereoselectivities) from a variety of benzyl, heteroaryl, allyl and alkyl alcohols via one‐pot alcohol oxidation‐Wittig reaction. The transformation utilizes air as the stoichiometric oxidant, and the inexpensive catalyst can be recovered and reused.
具有明确孔隙的氧化锰八面体分子筛(OMS)材料由于其令人着迷的化学和物理特性而被广泛研究了二十多年。OMS-2是锰的一种合成的三聚氰胺锰氧化物,是通过改进的回流方法合成的,被发现对从各种苄基中获得α,β-不饱和酯(产率高达95%且具有高非对映选择性)具有很高的活性。一锅法醇氧化-维蒂希反应制得的芳基,杂芳基,烯丙基和烷基醇。该转化利用空气作为化学计量的氧化剂,廉价的催化剂可以回收和再利用。