Loading...
Search for:
rajabi--f
0.015 seconds
A new protocol for O-methylation of phenolic compounds with trimethyl phosphite or trimethyl phosphate under solvent-free condition and microwave irradiation
, Article Phosphorus, Sulfur and Silicon and the Related Elements ; Volume 178, Issue 11 , 2003 , Pages 2343-2348 ; 10426507 (ISSN) ; Rajabi, F ; Sharif University of Technology
Taylor and Francis Ltd
2003
Abstract
A simple method for the preparation of industrially important alkyl aryl ethers is reported. Several phenolic compounds such as phenols, naphthols, and hydroxy coumarins were O-methylated with trimethyl phosphite or trimethyl phosphate under microwave irradiation and solvent-free condition in almost quantitative yields. Reaction of 2-naphthol with trimethyl phosphate gave mixture of 2-methoxynaphthalene and 1-methyl-2-methoxynaphthalene while the reaction with trimethyl phosphite gave mostly 2-methoxynaphthalene. This method is highly efficient for the methylating of phenolic compounds with very easy experimental procedure and environmental friendly conditions
A convenient route to the soluble guanylate cyclase activator YC-1 and its N2 regioisomer
, Article Heterocycles ; Volume 55, Issue 9 , 2001 , Pages 1813-1816 ; 03855414 (ISSN) ; Rajabi, F ; Sharif University of Technology
Japan Institute of Heterocyclic Chemistry
2001
Abstract
A new route to the soluble guanylate cyclase (sGC) activator YC-1 and its N2 regioisomer has been established with a Mitsunobu mediated N-alkylation as the key step. The route is utilised in the synthesis of a potential photoaffinity label
Microwave and BF3 promoted rearrangement of allyloxycoumarins to allylcoumarins and dihydrofurocoumarins
, Article Heterocycles ; Volume 55, Issue 9 , 2001 , Pages 1805-1812 ; 03855414 (ISSN) ; Rajabi, F ; Sharif University of Technology
Japan Institute of Heterocyclic Chemistry
2001
Abstract
Allyl, crotyl, methallyl and cinamyl ethers of 4-hydroxy-, 7-hydroxy-, and 4-methyl-7-hydroxycoumarins have been efficiently synthesized and rearranged to substituted allylcoumarins under microwave irradiation. Irradiation of allylcoumarins in the presence of BF3/ether directly produced substituted dihydrofurocoumarins in good yields
A mild and highly efficient protocol for the one-pot synthesis of primary α-amino phosphonates under solvent-free conditions
, Article Tetrahedron Letters ; Volume 45, Issue 50 , 2004 , Pages 9233-9236 ; 00404039 (ISSN) ; Rajabi, F ; Saidi, M. R ; Sharif University of Technology
2004
Abstract
Under solvent-free reaction conditions and in the presence of solid LiClO 4 a novel and mild protocol for the one-pot, three-component synthesis of primary α-amino phosphonates from an aldehyde, hexamethyldisilazane and a trialkyl phosphite is described giving high yields and having short reaction times. The same products are obtained in very low yields, when the three-component reaction is carried out under microwave irradiation and in the absence of solid LiClO 4. Examples of some prepared 1-aryl-N,N′-bis(arylidene)methanediamines are also described. © 2004 Elsevier Ltd. All rights reserved