Pyrido[2,3-b][1,4]oxazin-2-ones are conveniently prepared in excellent yields by a one-pot annulation of N-substituted-2-chloroacetamides with 2-halo-3-hydroxypyridines with use of cesium carbonate in refluxing acetonitrile. The key transformation features a Smiles rearrangement of the initial O-alkylation product and subsequent cyclization.
AlCl3-Catalysed trans N-acylation of Acetanilides with α-Chloropropionyl Chloride†‡
作者:H. R. Sonawane、A. V. Pol、B. S. Nanjundiah、A. Sudalai
DOI:10.1039/a705770i
日期:——
trans N-acylation of acetanilides with α-chloropropionyl chloride catalysed by AlCl3 has been shown to occur efficiently, affording 2-chloro-N-phenylpropanamides in preparative yields.
Haloalkyltetrazole and Aminoalkyltetrazole Derivatives
作者:Edward K. Harvill、Robert M. Herbst、Elizabeth G. Schreiner
DOI:10.1021/jo50012a006
日期:1952.12
N-Substituted-amides<sup>1</sup>
作者:Arthur H. Schlesinger、Erhard J. Prill
DOI:10.1021/ja01604a047
日期:1956.12
One‐Pot Synthesis of Pyridazino[1,4]oxazin‐3‐ones
作者:Chen Ma、Su‐Dong Cho、J. R. Falck、Dong‐Soo Shin
DOI:10.1081/scc-120030689
日期:2004.12.31
Pyridazino[1,4] oxazin-3-ones were conveniently prepared in a one-pot condensation of N-substituted 2-chloroacetamides with various 5-chloro-pyridazin-6-ones via rearrangement of a spiro-aminoketal intermediate.