Treibs; Sutter, Chemische Berichte, 1951, vol. 84, p. 96,99
作者:Treibs、Sutter
DOI:——
日期:——
YINGLIN, HAN;HONGWEN, HU, SYNTHESIS,(1990) N, C. 615-618
作者:YINGLIN, HAN、HONGWEN, HU
DOI:——
日期:——
A Convenient Synthesis of Aminomethyl Ketones (α-Amino Ketones)
作者:Han Yinglin、Hu Hongwen
DOI:10.1055/s-1990-26959
日期:——
Several N,N-diformylaminomethyl ketones 3 were prepared by treating the respective bromomethyl ketone 1 with sodium diformylamide in acetonitrile at room temperature. This reaction produced N-formylaminomethyl ketones 4 when ethanol was used as the solvent. One of the formyl groups of N,N-diformylaminomethyl ketones was selectively removed by using a catalytic amount of sodium or potassium hydroxide in alcohol to the corresponding N-formylaminomethyl ketones 4. The formyl groups of both N,N-diformyl- und N-formylaminomethyl ketones could be easily removed by either 5% hydrochloric acid in ethanol or 6 N hydrochloric acid to give the corresponding aminomethyl ketone hydrochlorides 5. These reactions are general and give high yield of the products.
The present invention relates to new substituted benzoxazepines and benzothiazepines of the general formula I ##STR1## in which X, R.sup.1, R.sup.2 and R.sup.3 have the meaning given in the description, processes for their preparation and their use in medicaments having vaso- and muscle-relaxing properties, in particular as circulatory agents.