SN-38 but also a negative influence on cell viability in general. Nevertheless, several candidates have EC50 values in the low double-digit nanomolar concentration range, qualifying them as some of the most potent reversers of ABCG2-mediated MDR. In addition, five novelmultitarget ABCB1/ABCC1/ABCG2 inhibitors were discovered, four of them exerting their inhibitory power against the three stated transporters
2-Oxo-1,8-naphthyridine-3-carboxylic acid derivatives with potent gastric antisecretory properties
作者:Arthur A. Santilli、Anthony C. Scotese、Raymond F. Bauer、Stanley C. Bell
DOI:10.1021/jm00395a015
日期:1987.12
The syntheses of 2-oxo-1,8-naphthyridine-3-carboxylic acid derivatives having potent gastricantisecretoryproperties in the pyloric-ligated (Shay) rat model are described. Two of the more potent compounds tested that were selected for more detailed dose-response evaluation were 4-amino-1-ethyl-1,2-dihydro-2-oxonaphthyridine-3-carboxylic acid ethyl ester (35) and 1-ethyl-1,2-dihydro-7-methyl-4-(4-
An optically active β-aminocarbonyl compound is obtained by a Mannich reaction between an aldimine in which: nitrogen is protected and a malonic acid diester, in the presence of optically active BINOL and dialkyl magnesium (in which two alkyl groups are the same or different) in an amount 1 to 2 molar times the amount of the BINOL.
PROCESS FOR PRODUCTION OF KETOMALONIC ACID COMPOUNDS OR HYDRATES THEREOF
申请人:Tani Shinki
公开号:US20120004443A1
公开(公告)日:2012-01-05
Disclosed is a process for the production of ketomalonic acid compounds or hydrates thereof by reacting a malonic acid compound with one or more chlorous acid compounds selected from among chlorous acid and chlorites and thus oxidizing the methylene group of the malonic acid compound. The process does not necessitate highly toxic reagents, lowly safe reagents, special reactants, special reaction equipment, expensive reagents, expensive catalysts, or transition metals such as noble metals, and permits the selection of mild reaction conditions and simple operation, thus enabling efficient and easy production of ketomalonic acid compounds such as ketomalonic diesters under simple and easy conditions suitable for industrialization.
Provided is a method for producing an industrially useful ketomalonic acid compound such as ketomalinic acid diesters, or a hydrate thereof, by a method more favorable from an economic and environmental standpoint and from a safety standpoint. The present invention relates to a method involving reacting a malonic acid compound represented by general formula (1)
(in the formula, The each Rs indicate an alkyl group, a cycloalkyl group, etc.) with chlorine dioxide to produce a ketomalonic acid compound represented by the general formula (2)
(in the formula, R has the same meaning as above), or a hydrate thereof.