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Azabenzocycloheptenones. Part 20. Synthesis and utilisation of 4-amino-1,2,3,4-tetrahydro-1(1H)-benzazepines

Booker-Milburn, Kevin I. and Dunkin, Ian R. and Kelly, Frances C. and Khalaf, Abedawn I. and Learmonth, David A. and Proctor, George R. and Scopes, David I. C. (1997) Azabenzocycloheptenones. Part 20. Synthesis and utilisation of 4-amino-1,2,3,4-tetrahydro-1(1H)-benzazepines. Journal of the Chemical Society, Perkin Transactions 1 (21). pp. 3261-3274. ISSN 1472-7781

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Abstract

1,2,3,4-Tetrahydro-6- and -7-methoxy-4-oxo-1-(p-tolylsulfonyl)quinolines and 1-ethoxycarbonylmethyl-1,2,3,4-tetrahydro-7-methoxy-4-oxoquinoline have been ring-expanded in two steps to 2,3,4,5-tetrahydro-7- and -8-methoxy-4-oxo-1-(p-tolylsulfonyl)-1H-1-benzazepines and 1-ethoxycarbonylmethyl-2,3,4,5-tetrahydro-8-methoxy-4-oxo-1H-1-benzazepine. Redn. of the oximes gives 4-amino-2,3,4,5-tetrahydro-7-methoxy-1-(p-tolylsulfonyl)-1H-1-benzazepine, 4-amino-2,3,4,5-tetrahydro-8-methoxy-1H-1-benzazepine, and 4-amino-1-ethoxycarbonylmethyl-2,3,4,5-tetrahydro-8-methoxy-1H-1-benzazepine. From these, several N-substituted and N,N-disubstituted compds. have been obtained and 3-amino-2,3,4,5-tetrahydro-1-(p-tolylsulfonyl)-1H-1-benzazepine has been made by similar means. Two routes are described to 2,3,4,5-tetrahydro-8-methoxy-5-oxo-1-(p-tolylsulfonyl)-1H-1-benzazepine which is converted to 2,3,4,5-tetrahydro-8-methoxy-4-methoxyimino-5-oxo-1-(p-tolylsulfonyl)-1H-1-benzazepine and thence to 5-[2-(ethoxycarbonyl)ethynyl]-2,3,4,5-tetrahydro-5-hydroxy-8-methoxy-4-methoxyimino-1-(p-tolylsulfonyl)-1H-1-benzazepine and 5-[2-(ethoxycarbonyl)ethyl]-2,3,4,5-tetrahydro-5-hydroxy-8-methoxy-4-methoxyimino-1-(p-tolylsulfonyl)-1H-benzazepine. Redn. of 2,3,4,5-tetrahydro-8-methoxy-4-oximino-5-oxo-1-(p-tolylsulfonyl)-1H-1-benzazepine in two steps gives both cis- and trans-4-acetamido-2,3,4,5-tetrahydro-5-hydroxy-8-methoxy-1-(p-tolylsulfonyl)-1H-1-benzazepines which are sep. deacetylated and cyclised with Et chloroacetate to cis- and trans-2,3,4,4a,5,6,7,11b-octahydro-9-methoxy-3-oxo-7-(p-tolylsulfonyl)[1,4]oxazino[3,2-d][1]benzazepine. By similar methodol. cis- and trans-2,3,4,5-tetrahydro-5-hydroxy-8-methoxy-4-propionamido-1-(p-tolylsulfonyl)-1H-1-benzazepines have been obtained, sepd. and the latter reduced to trans-2,3,4,5-tetrahydro-5-hydroxy-8-methoxy-4-(n-propylamino)-1-(p-tolylsulfonyl)-1H-1-benzazepine. In three steps the latter is converted to trans-2,3,4,4a,5,6,7,11b-octahydro-9-methoxy-4-(n-propyl)-7-(p-tolylsulfonyl)[1,4]oxazino[3,2-d][1]benzazepine.

Item type: Article
ID code: 34887
Keywords: azabenzocycloheptenones, benzazepines, Chemistry, Chemistry(all)
Subjects: Science > Chemistry
Department: Faculty of Science > Pure and Applied Chemistry
Depositing user: Pure Administrator
Date Deposited: 21 Oct 2011 13:39
Last modified: 21 May 2015 13:57
URI: http://strathprints.strath.ac.uk/id/eprint/34887

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