A new route to 4-unsubstituted .BETA.-lactams through ureidomethylation of ketene silyl acetals.
作者:KIYOSHI IKEDA、YOSHIYASU TERAO、MINORU SEKIYA
DOI:10.1248/cpb.29.1747
日期:——
α-Ureidomethylated carboxylates were obtained by the reaction of ketene silyl acetals with benzyl N-(chloromethyl) carbamates in the presence of titanium tetrachloride. Successive hydrogenolysis over palladium-on-charcoal followed by treatment with lithium diisopropylamide gave β-lactams.
Asymmetric alkylation of N-acylsultams: A general route to enantiomerically pure, crystalline C(α,α)-disubstituted carboxylic acid derivatives
作者:Wolfgang Oppolzer、Robert Moretti、Silvia Thomi
DOI:10.1016/s0040-4039(01)93810-9
日期:1989.1
Successive treatment of acylsultams with nBuLi or NHMDS and primary alkyl halides, followed by crystallization, gave pure C(α)-alkylation products and, via their non-destructive cleavage, enantiomerically pure alcohols or carboxylic acids .
[EN] FUMARATE COMPOUNDS, PHARMACEUTICAL COMPOSITIONS, AND METHODS OF USE<br/>[FR] COMPOSÉS DE FUMARATE, COMPOSITIONS PHARMACEUTIQUES ET PROCÉDÉS D'UTILISATION
申请人:XENOPORT INC
公开号:WO2016061393A1
公开(公告)日:2016-04-21
Monomethyl and monoethyl fumarate prodrugs, pharmaceutical compositions comprising the monomethyl and monoethyl fumarate prodrugs, and methods of using monomethyl and monoethyl fumarate prodrugs 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.