First Synthetic Method for the Preparation of 6-Unsubstituted-2,3-dihydro-1,3-oxazin-4-ones
摘要:
The first synthetic pathway to synthesize 6-unsubstituted-2,3-dihydro-1,3-oxazin-4-ones is described. The alpha-formylation of the starting amide and the cyclization of the alpha-formylamide with a desired aldehyde under acidic conditions gave compounds 5a-h (R = nPr, iPr, cPr, cHex, Ph, CH(2)Ph, nHex, and R(1) = H, Me). This strategy was used with little modification for the preparation of new monocyclic organic nitrates such as 2a-c (2a (R = Ph, R(1) = H, and R(2) = H), 2b (R = Ph, R(1) = H, and R(2) = Me), and 2c (R = H, R(1) = Ph, and R(2) = H).
A novel bicyclic system, 1,6-diaza-3,8-dioxabicyclo[4.4.1]undecane
作者:R. G. Kostyanovsky、Yu. I. El'natanov、O. N. Krutius、I. I. Chervin、H. Zaddach、K. F. Koehler
DOI:10.1007/bf00695844
日期:1994.2
Condensation of monoethanolamine with formaldehyde affords 1,6-diaza-3,8-dioxabicyclo[4.4.1]undecane andN,N′-methylene-bis(oxazolidine) in a ratio of 1∶8.