NOPR Collection:

A facile one-pot synthetic route to substituted fused tetrahydropyrimidines. Part 41: Synthesis of 1-(aralkyl/aryl)-3- (alkyl/aralkyl/aryl)-5-oxo-l,2,3,4,5,6,7,8-octahydroquinazolines and 1-(aralkyl/aryl)-3- (alkyl/aralkyl/aryl)-7,7-dimethyl-5-oxo- 1,2,3,4,5,6,7,8-octahydroquinazolines

Sat, 01 Apr 2006 00:00:00 GMT

Title: A facile one-pot synthetic route to substituted fused tetrahydropyrimidines. Part 41: Synthesis of 1-(aralkyl/aryl)-3- (alkyl/aralkyl/aryl)-5-oxo-l,2,3,4,5,6,7,8-octahydroquinazolines and 1-(aralkyl/aryl)-3- (alkyl/aralkyl/aryl)-7,7-dimethyl-5-oxo- 1,2,3,4,5,6,7,8-octahydroquinazolines Authors: Chanda, Kaushik; Dutta, Milan C; Vishwakanna, Jai N Abstract: A facile one pot pathway has been developed for the synthesis of novel 1-(aralkyl/aryl)-3-(alky/aralkyl/aryl)-5-oxo-1,2,3,4,5,6,7,8-octahydroquinazolirles 2a-e and 1-(aralkyl/aryl)-3-(alkyl/aralkyl/ary1)-7,7-dimethy1-5-oxo-1,2.3,4,5,6,7.8- octahydroquinazolines 2f-k by the cyclocondensation of cyclic enaminones la-d with formaldehyde and primary amines in refluxing methanol in good yields. Page(s): 1076-1079

Rapid and efficient microwave-assisted synthesis of 4-amino-3-mercapto- 5-substituted-1,2,4-triazoles

Sat, 01 Apr 2006 00:00:00 GMT

Title: Rapid and efficient microwave-assisted synthesis of 4-amino-3-mercapto- 5-substituted-1,2,4-triazoles Authors: Joshi, S S; Karnik, A V Abstract: Synthesis of 4-amino-3-mercapto-5-substituted-1,2,4-triazoles 3a-g, building blocks for the synthesis of fused heterocycles, under microwave irradiation is demonstrated. Page(s): 1057-1059

An efficient procedure for the synthesis of 1,1-diacetates from aldehydes with acetic anhydride catalyzed by silica sulfate

Sat, 01 Apr 2006 00:00:00 GMT

Title: An efficient procedure for the synthesis of 1,1-diacetates from aldehydes with acetic anhydride catalyzed by silica sulfate Authors: Jin, Tong-Shou; Zhao, Ying; Gu, Shu-Qing; Liu, Li-Bin; Li, Tong-Shuang Abstract: The reac tion of aldehyde with acetic anhydride catalyzed by silica sulfate results in 1,1-diac etates in high yield at room temperature. Page(s): 1054-1056

Microwave-assisted solvent-free Friedlander synthesis of 1,8-naphthyridines using ammonium acetate as catalyst

Sat, 01 Apr 2006 00:00:00 GMT

Title: Microwave-assisted solvent-free Friedlander synthesis of 1,8-naphthyridines using ammonium acetate as catalyst Authors: Mogilaiah, K; Rani, J Uma Abstract: The microwave enhanced synthes is of 1,8-naphthyridines 3 is achieved rapidly and in good yield via the Friedlander condensation of 2-aminonicotinaldehyde 1 with carbonyl compounds containing -methylene group 2 in the presence of ammonium acetate. Page(s): 1051-1053