Sayedramadan

Synthesis and reactions of 4-oxothiazolidines: a review

Eman a. e. el-helw and sayed k. ramadan
Date : 2019-10-23
Views : 471 Download : 225
Herein, the chemistry of 4-oxothiazolidines has been studied as well as the different methods for their synthesis and reactions were reported in this review....

2-cyano-n′-[(1,3-diphenyl-1h-pyrazol-4-yl)methylidene]acetohydrazide in the synthesis of nitrogen heterocycles

S. k. ramadan, e. a. e. el-helw, and m. e. azab
Date : 2019-10-23
Views : 684 Download : 213
Some interesting nitrogen heterocycles, as well as other products, were synthesized by reactions of 2-cyano-N′-[(1,3-diphenyl-1H-pyrazol-4-yl)methylidene]acetohydrazide with phenyl isothiocyana...

Novel synthesis of some imidazolyl-, benzoxazinyl-, and quinazolinyl- 2,4-dioxothiazolidine derivatives

Ali m. youssef, ahmed k. el-ziaty, wael s. i. abou-elmagd and sayed k. ramadan
Date : 2019-10-23
Views : 526 Download : 212
2-(2,4-Dioxothiazolidin-5-yl)acetic acid 1 and its chloride derivative 2 were allowed to react with different aromatic amines such as o-phenylenediamine, o-aminothiophenol, p-aminoacetophenone, and a...

Ring transformation of a 2(3h)-furanone derivative into oxazinone and pyrimidinone heterocycles

Ahmed i. hashem, wael s. i. abou-elmagd, ahmed k. el-ziaty, and sayed k. ramadan
Date : 2019-10-23
Views : 412 Download : 226
The conversion of the 2(3H)-furanone into the oxazinone and pyrimidinone derivatives is studied. A 2- (furan-2-ylmethylene)-4-oxo-4-phenylbutanoyl azide 3 was synthesized to carry out these conversio...