申请人:Henschke Julian Paul
公开号:US08497374B2
公开(公告)日:2013-07-30
A synthetic process for producing bortezomib comprising converting racemic boronic esters, such as the pinacol α-aminoboronic ester, into mixtures of diastereomers [6] by reaction with a suitably protected L-phenylalanine derivative (see Scheme 3), such as N—BOC-L-phenylalanine. The protecting group of the L-phenylalanine moiety is then removed, such as by reacting the diastereomers [6] with an acid, such as hydrochloric acid, to form a mixture of amine salt diastereomers [7] which is then subjected to conditions under which the desired diastereomer (R,S)-[7] is selectively isolated, such as by crystallization, chromatography or stereoselective hydrolysis. The separated desired diastereomer (R,S)-[7] is then converted into bortezomib or bortezomib anhydride.
一种合成硼替佐米的人工合成方法,包括将外消旋硼酸酯转化为对映异构体混合物[6],例如通过与适当保护的L-苯丙氨酸衍生物(见方案3),如N-BOC-L-苯丙氨酸反应。然后去除L-苯丙氨酸基团的保护基,例如通过与酸(如盐酸)反应形成胺盐对映异构体混合物[7],然后在选择性分离所需对映异构体(R,S)-[7]的条件下,例如通过结晶、色谱或立体选择性水解。然后将分离的所需对映异构体(R,S)-[7]转化为硼替佐米或硼替佐米无水物。