CuH-Catalyzed Asymmetric 1,6-Conjugate Reduction of <i>p</i>-Quinone Methides: Enantioselective Synthesis of Triarylmethanes and 1,1,2-Triarylethanes
作者:Ting Pan、Pan Shi、Bo Chen、Da-Gang Zhou、Ya-Li Zeng、Wen-Dao Chu、Long He、Quan-Zhong Liu、Chun-An Fan
DOI:10.1021/acs.orglett.9b02308
日期:2019.8.16
The first copperhydride (CuH)-catalyzed asymmetric 1,6-conjugate reduction of p-quinone methides is reported. This protocol provides a new method to access a variety of triarylmethanes and 1,1,2-triarylethanes in good yields with excellent enantioselectivities and broad functional group tolerance.
The present study describes the identification via privileged structure-based approach of the benzhydrylpiperazine moiety as a potential scaffold to develop novel CB1 receptor modulators. Efficient structural optimization of the initial four hit compounds led to a high quality lead series, represented by compound 6c. Compound 6c is a highly potent and selective CB1 receptor inverse agonist that is able to reduce body weight in diet-induced obese Sprague-Dawley rats. The preparation of privileged structure-based library, the progression from hit to lead, the structure-activity relationships in the lead series and in vitro and in vivo activity of compound 6c are discussed. (C) 2009 Elsevier Masson SAS. All rights reserved.