Catalytic asymmetric Tamura cycloaddition of homophthalic anhydrides with 2-arylidene-1,3-diones
作者:Han Xu、Feng Sha、Qiong Li、Xin-Yan Wu
DOI:10.1039/c8ob01970c
日期:——
An organocatalytic enantioselective Tamura cycloaddition between homophthalic anhydrides and 2-arylidene-1,3-indanediones has been developed. With 2 mol% of commercially available (DHQD)2PYR, a wide range of enantioenriched spiro-1,3-indanedione derivatives were obtained in good-to-excellent yields (68–98%), excellent diastereoselectivities (99 : 1 dr) and moderate-to-excellent enantioselectivities
已经开发了在间苯二甲酸酐和2-亚芳基-1,3-茚满二酮之间的有机催化对映选择性的Tamura环加成反应。用2 mol%的可商购(DHQD)2 PYR,获得了多种对映体富集的螺-1,3-茚满二酮衍生物,收率良好至优异(68–98%),非对映选择性极好(99:1 dr)和中等至出色的对映选择性(高达95%ee)。