Directed Orthometalation and the Asymmetric Total Synthesis of <i>N</i>-Deoxymilitarinone A and Torrubiellone B
作者:Feiqing Ding、Ronny William、Min Li Leow、Hua Chai、Jacqueline Zi Mei Fong、Xue-Wei Liu
DOI:10.1021/ol402820d
日期:2014.1.3
A diverted total synthesis (DTS) approach to the total synthesis of pyridone alkaloids N-deoxymilitarinone A (8) and torrubiellone B (10) has been developed. The common intermediate 14 was first assembled by a dual directed orthometalation process using a methoxymethyl group as directed metalation group. Other crucial steps include the assembly of polyenes under aldol condensation for DTS using general and concise strategy and diastereoselective synthesis of the syn-dimethyl array by an Evans aldol reaction.