Additions of 1-(.alpha.-Aminoalkyl)benzotriazoles to N-Vinylamines and N-Vinylamides. A Novel and Versatile Method for the Preparation of Unsymmetrically Substituted 1,3-Diamines
摘要:
Additions of N,N-dialkyl-1H-benzotriazole-1-methanamines 1 to 9-vinylcarbazole followed by reduction of the adducts with lithium aluminum hydride gave the corresponding 9-(3-(dialkylamino)propyl)carbazoles 8 in good yield. Treatment of the adducts with Grignard reagents gave products 9 with an alkyl or aryl group at the C-1 atom of the propylene linkage. Use of alpha-phenyl-N,N-dialkyl-1H-benzotriazole-1-methanamine (14) in the addition led to the C-3 phenyl substituted products 15-18. Similar additions to N-vinyl-N-methylacetamide or 1-vinyl-2-pyrrolidinone followed by reduction of the adducts gave unsymmetrically substituted 1,3-propanediamines. Triamine 36 was obtained by condensation of ethylamine with formaldehyde and benzotriazole, addition of the product to 1-vinylpyrrolidinone, and reduction of the adduct with lithium aluminum hydride. 1,3-Propanediamine used in this process gave hexahydropyrimidine 39 while 1,6-hexanediamine gave hexamine 42.
The present invention provides a method for producing optically active amines of formula (9) or (10): which comprises reacting an imine equivalent of formula (6): with an alkene of formula (7) or an alkyne of formula (8): in the presence of a chiral catalyst, which method does not require additional procedures such as introduction and removal of protecting groups and gives said amines with high purity and high operability. The optically active amines are useful as synthetic 15 intermediates for pharmaceuticals, agrochemicals, etc.
Additions of 1-(aminomethyl)benzotriazoles to enamines, enamides, and vinyl ethers: novel routes to 1,3-diamines and tetrahydroquinolines
作者:Alan R. Katritzky、Bogumila Rachwal、Stanislaw Rachwal
DOI:10.1021/jo00056a006
日期:1993.2
New methods for the synthesis of 1,3-diamines and of 4-substituted tetrahydroquinolines are described in which the key step is the addition of the condensation products derived from amines, aldehydes, and benzotriazole to enamines, enamides, and vinyl ethers.
Katritzky Alan R., Rachwal Stanislaw, Rachwal Bogumila, J. Org. Chem, 59 (1994) N 18, S 5206-5214
作者:Katritzky Alan R., Rachwal Stanislaw, Rachwal Bogumila
DOI:——
日期:——
Additions of 1-(.alpha.-Aminoalkyl)benzotriazoles to N-Vinylamines and N-Vinylamides. A Novel and Versatile Method for the Preparation of Unsymmetrically Substituted 1,3-Diamines
作者:Alan R. Katritzky、Stanislaw Rachwal、Bogumila Rachwal
DOI:10.1021/jo00097a023
日期:1994.9
Additions of N,N-dialkyl-1H-benzotriazole-1-methanamines 1 to 9-vinylcarbazole followed by reduction of the adducts with lithium aluminum hydride gave the corresponding 9-(3-(dialkylamino)propyl)carbazoles 8 in good yield. Treatment of the adducts with Grignard reagents gave products 9 with an alkyl or aryl group at the C-1 atom of the propylene linkage. Use of alpha-phenyl-N,N-dialkyl-1H-benzotriazole-1-methanamine (14) in the addition led to the C-3 phenyl substituted products 15-18. Similar additions to N-vinyl-N-methylacetamide or 1-vinyl-2-pyrrolidinone followed by reduction of the adducts gave unsymmetrically substituted 1,3-propanediamines. Triamine 36 was obtained by condensation of ethylamine with formaldehyde and benzotriazole, addition of the product to 1-vinylpyrrolidinone, and reduction of the adduct with lithium aluminum hydride. 1,3-Propanediamine used in this process gave hexahydropyrimidine 39 while 1,6-hexanediamine gave hexamine 42.