Secondary amines, processes for their preparation, and pharmaceutical compositions containing them
申请人:BEECHAM GROUP PLC
公开号:EP0063004A1
公开(公告)日:1982-10-20
The compounds of formula (I);
and salts thereof; wherein
R1 is hydrogen or methyl;
R2 is hydrogen or methyl;
R3 is hydrogen, fluorine, chlorine, bromine, trifluoromethyl or C1-6 alkyl;
n is 1 or 2;
X is C1-6 straight or branched alkylene; and
R4 is C1-6 alkoxy, hydroxy or amino optionally substituted with one or more lower alkyl groups,
A is hydrogen, bromine, chlorine, or fluorine, have been
found to possess anti-obesity and/or anti-hyperglycaemic activity.
式(I)化合物
及其盐类;其中
R1 是氢或甲基
R2 是氢或甲基
R3 是氢、氟、氯、溴、三氟甲基或 C1-6 烷基;
n 是 1 或 2;
X 是 C1-6 直链或支链亚烷基;以及
R4 是任选被一个或多个低级烷基取代的 C1-6 烷氧基、羟基或氨基、
A 是氢、溴、氯或氟。
或抗高血糖活性。
In Situ Generation and Intramolecular Schmidt Reaction of Keto Azides in a Microwave-Assisted Flow Format
作者:Thomas O. Painter、Paul D. Thornton、Mario Orestano、Conrad Santini、Michael G. Organ、Jeffrey Aubé
DOI:10.1002/chem.201100768
日期:2011.8.22
Go with the flow! A method for conversion of keto halides to lactams by means of sequential azidation and intramolecularSchmidtreaction in a combined flowformat is described (see scheme; MWI=microwave irradiation, TFA=trifluoroacetic acid).
Overcoming Product Inhibition in Catalysis of the Intramolecular Schmidt Reaction
作者:Hashim F. Motiwala、Charlie Fehl、Sze-Wan Li、Erin Hirt、Patrick Porubsky、Jeffrey Aubé
DOI:10.1021/ja402848c
日期:2013.6.19
carrying out the intramolecularSchmidtreaction of alkylazides and ketones using a substoichiometric amount of catalyst is reported. Following extensive screening, the use of the strong hydrogen-bond-donating solvent hexafluoro-2-propanol was found to be consistent with low catalyst loadings, which ranged from 2.5 mol % for favorable substrates to 25 mol % for more difficult cases. Reaction optimization