The present invention relates to a novel process for the preparation of (3R, 3aS, 6aR)- hexahydrofuro [2, 3-b] furan-3-ol of formula I by reacting a compound of formula VII with the compound of formula R2-OH in the presence of haloginating agent to obtain a compound of formula VI and treating a compound of formula VI with dehaloginating agent to obtain a compound of formula V by reducing a compound of formula V, followed by cylization to obtain compound of formula IV and separating the enantiomer and diastereomers from compound of formula IV to yield a compound of formula I. Compound of formula I is useful as an intermediate in the preparation of protease inhibitors, in particular broad spectrum HIV protease inhibitors, the present invention also relates to process for the preparation of Darunavir from (3R, 3aS, 6aR)-hexahydrofuro [2, 3-b] furan-3-ol.
本发明涉及一种新型制备(3R,3aS,6aR)-六氢
呋喃[2,3-b]
呋喃-3-醇(I)的方法,通过在卤化试剂存在下将化合物VII与化合物R2-OH反应以获得化合物VI,然后用去卤试剂处理化合物VI以获得化合物V。通过还原化合物V,随后环化以获得化合物IV,并从化合物IV中分离出对映异构体和顺反异构体,从而得到化合物I。化合物I在制备蛋白酶抑制剂,特别是广谱HIV蛋白酶抑制剂的中间体中有用。本发明还涉及从(3R,3aS,6aR)-六氢
呋喃[2,3-b]
呋喃-3-醇制备
达芦那韦的方法。