Synthesis of Succinimido[3,4-b]indane and 1,2,3,4,5,6-Hexahydro-1,5-methano-3-benzazocine-2,4-dione by Sequential Alkylation and Intramolecular Arylation of Enolates Derived from <i>N,N,N</i><i>‘</i><i>N</i>‘-Tetramethylbutanediamides and <i>N,N,N</i><i>‘</i><i>N</i>‘-Tetramethylpentanediamides
作者:Sushama A. Dandekar、Stacey N. Greenwood、Thomas D. Greenwood、Stéphane Mabic、Joseph S. Merola、James M. Tanko、James F. Wolfe
DOI:10.1021/jo982000b
日期:1999.3.1
refluxing THF. Treatment of 20 with KNH(2) in liquid NH(3) led to intramolecular arylation and accompanying ammonolysis to afford trans-1-(N,N-dimethylcarboxamido)-1,2,3,4-tetrahydronaphthalene-3-carboxamide (21b). Conversion of 21b to 5 was similarly effected by means of NaH. Experiments designed to test the mechanistic aspects of the intramolecular arylations provided evidence for competing aryne and SET
通过将N,N,N',N'-四甲基丁二酰胺(6)和N,N,N',N'-四甲基戊二酰胺(19)的单烯酸锂初始烷基化来合成三环标题化合物4和5于-60°C在液体NH(3)中生成-碘代苄基氯,得到2-(2-碘代苄基)-N,N,N',N'-四甲基丁二酰胺(9)和2-(2-碘代苄基)-N,N ,N′,N′-四甲基戊二酰胺(20)的产率分别为88%和87%。在液体NH(3)中用KNH(2)处理9导致形成和分子内芳基化的程度较低,即取代的α-烯酸酯在60中产生反式1,2-双(N,N-二甲基甲酰胺基)茚满(10a) % 让。用Na(2)O(2)水溶液选择性水解10a,得到反式1-(N,N-二甲基羧酰胺基)茚满-2-羧酸(17),然后通过转化为反式-1-(N,N-二甲基羧酰胺基)茚满-2-羧酰胺(10c)将其转化为桥接的琥珀酰亚胺4,然后通过NaH在回流的THF中将该混合的伯/叔酰胺环化。用液体NH(3)中的