Synthesis of Chiral 1,2-Amino Alcohol-Containing Compounds Utilizing Ruthenium-Catalyzed Asymmetric Transfer Hydrogenation of Unprotected α-Ketoamines
作者:Hari P. R. Mangunuru、Leila Terrab、Venumadhav Janganati、Nageswara Rao Kalikinidi、Srinivasarao Tenneti、Vasudevan Natarajan、Arun D. R. Shada、Santhosh Reddy Naini、Praveen Gajula、Daniel Lee、Lalith P. Samankumara、Manasa Mamunooru、Aravindan Jayaraman、Rajkumar Lalji Sahani、Jinya Yin、Chathuranga C. Hewa-Rahinduwage、Aravind Gangu、Anji Chen、Zhirui Wang、Bimbisar Desai、Tai Y. Yue、Chaitanya S. Wannere、Joseph D. Armstrong、Kai O. Donsbach、Gopal Sirasani、B. Frank Gupton、Bo Qu、Chris H. Senanayake
DOI:10.1021/acs.joc.4c00045
日期:——
steps. We identified a facile synthetic protocol via a highly enantioselective one-step process for epinephrine and a two-step process for norepinephrine starting from unprotected α-ketoamines 1b and 1a, respectively. This newly developed enantioselectiveruthenium-catalyzed asymmetric transfer hydrogenation was extended to the synthesis of many 1,2-amino alcohol-containing drug molecules such as phenylephrine
A feasibility study on the synthesis of phenylephrine via ruthenium-catalyzed homogeneous asymmetric hydrogenation
作者:John F. McGarrity、Antonio Zanotti-Gerosa
DOI:10.1016/j.tetasy.2010.09.013
日期:2010.10
We report a feasibility study on a new route to (R)-phenylephrine based on the ruthenium catalyzed asymmetric hydrogenation of an aminoketone precursor The direct and fast asymmetric reduction of aminoketones or their hydrochloride salts is achievable at low catalyst loadings (molar substrate to catalyst ratio S/C >25 000/1 TOF up to 25 000 h(-1)) with high enantioselectivity (>95% ee) without the need for N-protection nor isolation of the free base prior to reaction 2010 Elsevier Ltd All rights reserved
ALPATOVA, T. V.;KOVTUN, V. YU.;OLOVYANISHINIKOVA, Z. A.;KLIMOVA, A. L.;KU+, XIM.-FARMATS. ZH., 22,(1988) N1, S. 1349-1355
作者:ALPATOVA, T. V.、KOVTUN, V. YU.、OLOVYANISHINIKOVA, Z. A.、KLIMOVA, A. L.、KU+
DOI:——
日期:——
Phenylephrine Hydrochloride Compositions and Containers
申请人:Nevakar Inc.
公开号:US20210228507A1
公开(公告)日:2021-07-29
A ready-to-administer antioxidant free phenylephrine compositions has improved stability and is optionally free of metal chelating agents. Contemplated compositions are preferably packaged into a flexible polymer bag and maintain degradation of the phenylephrine at remarkably low levels, even over extended storage periods.