Acetonides are obtained in a one-step reaction of a carboxylic acid halide, a 1,2-aminoalcohol, and 2-alkoxypropene or 2,2-dialkoxypropane in an ether solvent and in the presence of an inorganic base. Acetonides are also obtained in a two-step reaction scheme in which an acid halide and 1,2-aminoalcohol are reacted in an ether solvent in the presence of LiOH to form a hydroxyamide, which is then reacted with 2-alkoxypropene or 2,2-dialkoxypropane in the presence of acid to form the acetonide. The acetonides resulting from the one-step and two-step protocols can be further reacted with an allylating agent such as an allyl halide in the presence of a strong base to provide the corresponding allyl acetonide. The acetonides and allyl acetonides can serve as intermediates in the production of certain HIV protease inhibitors which are useful for treating HIV infection and AIDS.
Acetonides是通过在醚溶剂中,在
无机碱的存在下,将
羧酸卤、1,2-
氨基醇和2-烷氧基
丙烯或2,2-二烷氧基
丙烷进行一步反应而获得的。Acetonides也可以通过两步反应方案获得,其中酸卤和1,2-
氨基醇在醚溶剂中在LiOH的存在下反应以形成羟基酰胺,然后在酸的存在下与2-烷氧基
丙烯或2,2-二烷氧基
丙烷反应以形成
缩醛。通过一步和两步方案得到的
缩醛可以进一步与烯丙基卤等烯丙基化试剂在强碱的存在下反应,从而得到相应的烯丙基
缩醛。这些
缩醛和烯丙基
缩醛可以作为某些用于治疗HIV感染和艾滋病的HIV蛋白酶抑制剂的生产中间体。