Chiral Lewis Base-Assisted Brønsted Acid (LBBA)-Catalyzed Enantioselective Cyclization of 2-Geranylphenols
作者:Akira Sakakura、Masayuki Sakuma、Kazuaki Ishihara
DOI:10.1021/ol201032t
日期:2011.6.17
Brønsted acids (Chiral LBBAs) have been designed as new organocatalysts for biomimetic enantioselective cyclization. A salt of a chiral phosphonous acid diester with FSO3H catalyzes the enantioselective cyclization of 2-geranylphenols to give the desired trans-fused cyclized products with high diastereo- and enantioselectivities (up to 98:2 dr and 93% ee).
手性Lewis碱辅助的布朗斯台德酸(手性LBBA)已被设计为仿生对映选择性环化的新型有机催化剂。与FSO手性亚膦酸二酯的盐3 ħ催化2- geranylphenols对映选择性环化,得到所需的反式稠合环化产品具有高diastereo-和对映选择性(高达98:2博士和93%ee)的。