isocyanates via base-induced β-elimination of haloform N-monosubstituted trihaloacetamides is described. The rate of reaction exhibits a strong dependence on the nature of the trihalomethyl group. Thus, while the reaction of tribromoacetamides proceeds at room temperature and the reaction of trichloroacetamides requires heating in polar solvents, no reaction could be observed for any of the corresponding
This invention relates to nitroimidazoxadiazocine compounds having the general Formula I, pharmaceutical compositions and uses of the same. The invention also relates to methods of making such nitroimidazoxadiazocine compounds of Formula I.
Photolysis of trichloroacetamide in nondegassed methanol gave methyl oxanilate (13–44%), along with carbamate (3–20%) and amine (4–12%). Similar irradiation of other trichloroacetyl derivatives of aliphatic ketone, aldehyde, and acetate afforded only radical product. The results are interpreted in terms of the mechanism involving electron transfer of the radical pair.
Compounds that have agonist activity at one or more of the SlP receptors are provided. The compounds are sphingosine analogs that, after phosphorylation, can behave as agonists at S lP receptors.
Steric and Electronic Effects in the Synthesis and Regioselective Hydrolysis of Unsymmetrical Imides
作者:Jing Shang、Aysa Pourvali、James R. Cochrane、Craig A. Hutton
DOI:10.1071/ch15504
日期:——
pivalic acid) are tolerated, but electron deficient acids, such as trifluoroacetic acid, are ineffective coupling partners. Furthermore, an interplay of both steric and electroniceffects is observed in the subsequent hydrolysis of unsymmetrical imides. Imides with a dimethoxybenzoyl group give high regioselectivity upon hydrolysis, favouring cleavage of the distal acyl group. Imides with a p-nitrobenzoyl