Aerobic oxidative cyclization of 2,2′-dihydroxystilbenes via oxygen cation radical to give cis-4b,9b-dihydrobenzofuro[3,2-b]benzofurans was carried out in an enantioselective manner (up to 89% ee) by using (nitrosyl)Ru(salen) 10 as the catalyst under photo-irradiated conditions.
在光辐射条件下,以(亚硝基)Ru(salen)10 为催化剂,通过氧阳离子自由基对 2,2′-二羟基
二苯乙烯进行了有氧氧化环化反应,得到了顺式-4b,9b-二氢
苯并呋喃并[3,2-b]
苯并呋喃(对映选择性高达 89%ee)。