NOPR Collection: http://nopr.niscpr.res.in/handle/123456789/6004 2026-10-09T10:07:27Z 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 http://nopr.niscpr.res.in/handle/123456789/30693 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: <span style="mso-bidi-language:HI">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 <b>2a-e</b> and 1-(aralkyl/aryl)-3-(alkyl/aralkyl/ary1)-7,7-dimethy1-5-oxo-1,2.3,4,5,6,7.8- <span style="mso-bidi-language:HI">octahydroquinazolines <b>2f-k</b> by the cyclocondensation of cyclic enaminones <b>la-d</b> with formaldehyde and primary amines in refluxing methanol in good yields. </span></span> Page(s): 1076-1079 2006-04-01T00:00:00Z Rapid and efficient microwave-assisted synthesis of 4-amino-3-mercapto- 5-substituted-1,2,4-triazoles http://nopr.niscpr.res.in/handle/123456789/10578 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 2006-04-01T00:00:00Z An efficient procedure for the synthesis of 1,1-diacetates from aldehydes with acetic anhydride catalyzed by silica sulfate http://nopr.niscpr.res.in/handle/123456789/10577 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 2006-04-01T00:00:00Z Microwave-assisted solvent-free Friedlander synthesis of 1,8-naphthyridines using ammonium acetate as catalyst http://nopr.niscpr.res.in/handle/123456789/10576 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 <img src='/image/spc_char/alpha.gif' border=0> -methylene group 2 in the presence of ammonium acetate. Page(s): 1051-1053 2006-04-01T00:00:00Z