Ru-catalyzed asymmetric transfer hydrogenation of α-acyl butyrolactone via dynamic kinetic resolution: Asymmetric synthesis of bis-THF alcohol intermediate of darunavir
作者:Ganesh V. More、Pushpa V. Malekar、Rupali G. Kalshetti、Mahesh H. Shinde、Chepuri V. Ramana
DOI:10.1016/j.tetlet.2021.152831
日期:2021.3
acid/triethylamine at rt gave the corresponding (S)-3-((S)-2-(benzyloxy/benzoyloxy)-1-hydroxyethyl)dihydrofuran-2(3H)-one with good to excellent diastereo- and enantioselectivity. One of the resulting hydrogenation product prepared on gram scales was utilized for the synthesis of (3R,3aS,6aR)-hexahydrofuro[2,3–b]furan-3-ol (1), a key synthetic intermediate of various HIV protease inhibitors such as darunavir
Ru-催化对映-和非对映选择性的动态动力学拆分α - (苄氧基/苯甲酰氧基)酰基γ丁内酯已审查通过转移氢化。采用原位制备的(R,R)-Ru-FsDPEN催化剂,在室温下使用甲酸/三乙胺进行转移氢化得到相应的(S)-3-((S)-2-(苄氧基/苯甲酰氧基)-1 -羟乙基)二氢呋喃-2(3 H)-具有非对映和对映选择性优良。将以克为单位制备的所得氢化产物之一用于合成(3 R,3a S,6α - [R )-六氢呋喃并[2,3- b ]呋喃-3-醇(1),中间的各种HIV的关键合成蛋白酶抑制剂,例如具有优良的达芦那韦对映- (95%EE)和非对映选择性(DR 95:5 )。