Reaction of spiro[piperidine-4,2'-(1',2',3',4'-tetrahydroquinazolin)]-4'-ones with acid anhydrides.
作者:MASATOSHI YAMATO、JIROH HORIUCHI、YASUO TAKEUCHI
DOI:10.1248/cpb.28.2623
日期:——
Acylation of spiro[piperidine-4, 2'-(1', 2', 3', 4'-tetrahydroquinazolin)]-4'-ones (1d, 4, 6, and 7) was attempted. In all cases, the resulting products were not the corresponding acyl derivatives but two types of products (2 or 3 and 5). Heating 1d, the derivative having hydrogen atoms on the N(1) and N(3)-positions of spiro[piperidine-4, 2'-(1', 2', 3', 4'-tetrahydroquinazolin)]-4'-ones with acetic anhydride or benzoic anhydride gave 1-(1-benzyl-1, 2, 5, 6-tetrahydro-4-pyridyl)-2-methyl-1, 4-dihydroquinazolin-4-one (2) or 1-(1-benzyl-1, 2, 5, 6-tetrahydro-4-pyridyl)-2-methyl-1, 4-dihydroquinazolin-4-one (3), respectively. On the other hand, heating 4, the N(1)-substituted derivative of 1d, with acetic anhydride gave 2-benzyl-5-methyl-1, 2, 3, 4, 5, 10-hexahydro-benzo[b]-1, 6-naphthyridin-10-one (5). The N(3)-substituted derivatives (6 and 7) of 1d did not react with acetic anhydride.
尝试将螺[哌啶-4, 2'-(1', 2', 3', 4'-四氢喹唑啉)]-4'-酮(1d、4、6和7)酰化。在所有情况下,所得产物都不是相应的酰基衍生物,而是两种类型的产物(2或3和5)。加热1d,得到螺[哌啶-4,2'-(1',2',3',4'-四氢喹唑啉)]-4'的N(1)和N(3)位上有氢原子的衍生物-与乙酸酐或苯甲酸酐反应生成1-(1-苄基-1,2,5,6-四氢-4-吡啶基)-2-甲基-1,4-二氢喹唑啉-4-酮(2)或1- (1-苄基-1,2,5,6-四氢-4-吡啶基)-2-甲基-1,4-二氢喹唑啉-4-酮(3)。另一方面,将1d的N(1)-取代衍生物4与乙酸酐加热,得到2-苄基-5-甲基-1,2,3,4,5,10-六氢-苯并[b]- 1、6-萘啶-10-一(5)。 1d的N(3)-取代衍生物(6和7)不与乙酸酐反应。