N-烷基-N-(2-乙烯基苄基)prop-2-en-1-胺衍生物经历一锅烯烃异构化/脂族烯胺闭环复分解(RCM)/氧化/ 1,3-偶极环加成序列,钌络合物Ru(CO)HCl(PPh 3)3,第二代Hoveyda-Grubbs催化剂和1,3-双极性亲和剂。总体而言,在一次操作中,反应序列通过三个独特的钌催化转化,将简单的苄胺衍生物转化为具有π共轭四环系统的异吲哚并[1,2- a ]异喹啉。
3-Arylindolizines were prepared by one-pot domino reactions from benzyl halides with pyridine (or isoquinoline) and cyclic or acyclic dihalide-substituted electron-deficient alkenes in the presence of potassium carbonate via in situ generated N-ylide intermediate. Both electron-donating and electron-withdrawing groups are tolerated in the aryl ring of benzyl halides. The yields range from moderate to high.
In all reactions studied up to the present time with olefins, the Reissert hydrofluoroborate salts have given only the Diels-Alder adducts. With 1,4-benzo- and naphtoquinones, we have found evidence for 1,3-dipolar cycloaddition. The structure of cycloadducts was determined from spectroscopic data and specified by a radiocristallographic study.