通往(+)-(20 R)-De- AB -cholesta-8(14),22-dien-9-one和(+)-(20 S)-De- AB -isocholesta-8(14)的新途径(S)-和(R)-2,3- O-异亚丙基甘油醛的,22-dien-9-一个
摘要:
旋光的(+)-(20 R)-de- AB -cholesta-8(14),22-dien-9-一(1)和(+)-(20 S)-de- AB -isocholesta-8 (14),22-dien-9-one(2)已通过立体和区域选择性迈克尔加成反应衍生自(S)-2,3- O-异亚丙基甘油醛的(3S)-甲基环戊酮(4)(5)及其(R)-异构体;(1)和(2)中C 20处的甲基通过烯丙基乙烯基醚的克莱森重排(12),然后分别将所得的均醛(13)和(14)脱羰。
通往(+)-(20 R)-De- AB -cholesta-8(14),22-dien-9-one和(+)-(20 S)-De- AB -isocholesta-8(14)的新途径(S)-和(R)-2,3- O-异亚丙基甘油醛的,22-dien-9-一个
摘要:
旋光的(+)-(20 R)-de- AB -cholesta-8(14),22-dien-9-一(1)和(+)-(20 S)-de- AB -isocholesta-8 (14),22-dien-9-one(2)已通过立体和区域选择性迈克尔加成反应衍生自(S)-2,3- O-异亚丙基甘油醛的(3S)-甲基环戊酮(4)(5)及其(R)-异构体;(1)和(2)中C 20处的甲基通过烯丙基乙烯基醚的克莱森重排(12),然后分别将所得的均醛(13)和(14)脱羰。
The present invention relates to a process for preparing nebivolol and, more particularly, to a process for preparing d-nebivolol and its enantiomer l-nebivolol or acid addition salts thereof starting from commercially available or easily obtainable 2,2-dimethyl-1,3 dioxolane-4-carbaldehyde and a vinyl Grignard reagent.
The present invention relates to modified nebivolol formate useful in the preparation of highly pure nebivolol.
本发明涉及用于制备高纯度奈必洛尔的改性甲酸奈必洛尔酯。
A New Synthesis of (4R, 5S)-2,2-Dimethyl-5-[(Z)-2-pentenyl]-1,3-dioxolane-4-carboxaldehyde
作者:P. K. Sharma、S. K. Srivastava、S. Sharma
DOI:10.1080/00397919508012688
日期:1995.4
Stereoselective synthesis of (4R, 5S)-2,2-dimethyl-5-[(Z)-2-pentenyl]-1,3-dioxolane-4-carboxaldehyde starting from (4S)-2,2-dimethyl-1,3-dioxolane-4-carboxyaldehyde, is described.
Process for the preparation of nebivolol
申请人:Menarini International Operations Luxembourg S.A.
公开号:EP2646426B1
公开(公告)日:2015-10-07
PROCESS FOR THE PREPARATION OF NEBIVOLOL
申请人:Mauro Sandro
公开号:US20130295622A1
公开(公告)日:2013-11-07
The present invention relates to a novel process for the synthesis of the Nebivolol product depicted in Scheme 1, comprised of a reduced number of high-yield steps, and characterized by the enzymatic resolution of the chroman ester precursor.