New hydantoinases from thermophilic microorganisms — Synthesis of enantiomerically pure D-amino acids
摘要:
A series of 14 D-alpha-amino acids were prepared in high chemical and optical yields from the corresponding racemic hydantoins by employing two novel hydantoinases from om thermophilic microorganisms.
Synthesis of Carbocyclic Hydantocidins via Regioselective and Diastereoselective Phosphine-Catalyzed [3 + 2]-Cycloadditions to 5-Methylenehydantoins
作者:Tien Q. Pham、Stephen G. Pyne、Brian W. Skelton、Allan H. White
DOI:10.1021/jo050827h
日期:2005.8.1
The phosphine-catalyzed [3 + 2]-cycloaddition of 5-methylenehydantoins 4 with the ylides 5, derived from addition of tributylphosphine to the 2-butynoic acid derivatives, 6a−d, gives spiro-heterocyclic products. The camphor sultam derivative 6b gives optically active products. Noteable was that the ylides derived from ethyl 2-butynoate and the 3-(2-butynoyl)-1,3-oxazolidin-2-one derivatives 6c and
作者:José M. Fraile、Gustavo Lafuente、José A. Mayoral、Antonio Pallarés
DOI:10.1016/j.tet.2011.09.034
日期:2011.11
derivatives, can be obtained by different synthetic routes. These compounds can undergo a large variety of reactions, such as Diels–Alder, epoxidation, methanol addition and conjugate addition reactions of different types of nucleophiles, including carbon (cyanide), nitrogen (piperidine) and sulfur (thiols, thioacetate) nucleophiles. The reactivity with electrophilic reagents, such as m-CPBA or methanol
FUMARATE COMPOUNDS, PHARMACEUTICAL COMPOSITIONS THEREOF, AND METHODS OF USE
申请人:Nguyen Mark Quang
公开号:US20160229819A1
公开(公告)日:2016-08-11
Fumarate compounds, pharmaceutical compositions comprising the fumarate compounds, and methods of using fumarate compounds and pharmaceutical compositions for treating neurodegenerative, inflammatory, and autoimmune disorders including multiple sclerosis, psoriasis, irritable bowel disorder, ulcerative colitis, arthritis, chronic obstructive pulmonary disease, asthma, Parkinson's disease, Huntington's disease, and amyotrophic lateral sclerosis are disclosed.