The invention is a process for the preparation of N-substituted imidazolidinones and N-substituted 2-thionimidazolidinones which comprises contacting an oxazolidinone with a compound containing a nitrogen directly bonded to a carbonyl or a thiocarbonyl group in the presence of a Lewis acid catalyst or the hydrate of a Lewis acid catalyst under conditions such that an N-substituted imidazolidinone or N-substituted 2-thionimidazolidinone is prepared. The compound containing a nitrogen directly bonded to a carbonyl or a thiocarbonyl group is an isocyanate or isothiocyanate or a compound wherein the nitrogen is reactive and the carbonyl or thiocarbonyl group is further bonded to a substituent by a bond which is clevable under the reaction conditions. The Lewis acid catalyst corresponds to the formula MX.sub.n wherein M is a group IB-VIIIB, IIIA or IVA element with the proviso that M is not C or Si; X is a halogen; and n is 2, 3 or 4.
本发明涉及一种制备N-取代
咪唑啉酮和N-取代2-
硫代
咪唑啉酮的方法,包括在
路易斯酸催化剂或
路易斯酸催化剂的
水合物存在下,将
氧杂环
丙酮与含有直接与羰基或
硫代羰基基团相连的
氮化合物接触,以制备N-取代
咪唑啉酮或N-取代2-
硫代
咪唑啉酮。含有直接与羰基或
硫代羰基基团相连的
氮化合物是
异氰酸酯或异
硫氰酸酯,或者是
氮原子具有反应性,羰基或
硫代羰基基团进一步通过在反应条件下可断裂的键连接到取代基上的化合物。
路易斯酸催化剂对应于
MXn的公式,其中M是IB-VIIIB、IIIA或IVA元素,但M不是C或Si;X是卤素;n为2、3或4。