20-May-2013
17:24:05 IST
|
NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Chemistry -Section B (IJC-B) >
IJC-B Vol.50B [2011] >
IJC-B Vol.50B(07) [July 2011] >
| Title: | A one-step synthesis of 5,7-diaryl-1,5-dihydro (or 1,2,3,5-tetrahydro)-pyrano [2,3-d]pyrimidin-2,4-diones (or 2-thioxo-4-ones) |
| Authors: | Ahmed, M Giasuddin
Romman, U K R
Akhter, Kawsari
Halim, Md Ershad
Rahman, Md Mahbubur
Ahmed, S Mosaddeq |
| Issue Date: | Jul-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | A one-step synthesis of
5,7-diaryl-1,5-dihydro-pyrano[2,3-d]pyrimidin-2,4-diones, 3a-c and
5,7-diaryl-2-thioxo-1,2,3,5-tetrahydropyrano[2,3-d]pyrimidin-4-ones, 3d-g has been achieved by the
cyclocondensation of barbituric acid or thiobarbituric acid 1 with arylideneacetophenones, 2a-d in glacial acetic acid in the presence of
phosphorous pentoxide. The structures of the compounds 3a-g have been determined by their UV,
IR, 1H NMR, 13C NMR, mass spectral data and elemental
analyses. |
| Page(s): | 946-948 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0983(Online); 0376-4699(Print) |
| Source: | IJC-B Vol.50B(07) [July 2011]
|
|
