Studies in biomimetic polyether synthesis: Synthesis of an A-ring subunit of etheromycin
作者:Ian Paterson、Richard D. Tillyer、Glen R. Ryan
DOI:10.1016/s0040-4039(00)79360-9
日期:1993.7
22 were prepared by stereocontrolled aldol reactions of (S)- and (R)-18 with the enal 8. Acetonide hydrolysis gave the bicyclic acetals 23–25, while the benzoate 26 gave the tetrahydropyran 6, corresponding to an A-ring subunit for 2-epi-etheromycin.
β型羟基酮7,20,和22分别通过(的立体控制羟醛缩合反应制备的小号和( - )- [R ) - 18与烯醛8。乙醛水解得到双环缩醛23-25,而苯甲酸酯26得到四氢吡喃6,相当于2-表醚霉素的A环亚基。