prepared from commercially available trans-1,4-dichloro-2-butene were converted to trans-disubstituted 5- and 6-membered ring systems with perfect diastereoselectivity and high enantioselectivity under chiral ruthenium catalysis. These products contain stereodefined secondary and tertiary alcohols that originate from the trapping of an alkylruthenium intermediate with adventitious water. Key to the success
由市售的
反式-1,4-二氯-2-丁烯制备的烯丙基
氯在手性
钌催化下转化为具有完美非对映选择性和高对映选择性的反式二取代5-和6-元环系统。这些产品含有立体定义的仲醇和叔醇,这些醇源自用外来
水捕获烷基
钌中间体。这种转变成功的关键是开发了一种新的基于 BINOL 的亚
磷酰胺
配体,在其 3 位和 3' 位含有大量取代。作为产品效用的证明,以高产率和立体选择性对手性
苄醇进行非对映选择性 Friedel-Crafts 反应。