method for the one‐pot synthesis of the biologically important heterocyclicmolecules 5‐unsubstituted 3,4‐dihydropyrimidin‐2‐ones and thiones using gem‐dibromomethylarenes, oxalacetic acid, and urea or thiourea. Gem‐dibromomethylarenes are used as aldehyde equivalent for the efficient synthesis of 3,4‐dihydropyrimidin‐2‐ones/thiones. This reaction offers advantages for the synthesis of these compounds
Compounds of Formula (I): in which A
1
, A
2
, W, L, G, R
7a
, R
7b
, R
8
, R
9
and R
10
have the meanings given in the specification, are DP2 receptor modulators useful in the treatment of immunologic diseases.
One-pot approach for the synthesis of 2-aryl benzothiazoles via a two-component coupling of gem-dibromomethylarenes and o-aminothiophenols
作者:Chandrappa Siddappa、Vinaya Kambappa、Muddegowda Umashankara、Kanchugarakoppal S. Rangappa
DOI:10.1016/j.tetlet.2011.08.055
日期:2011.10
One-pot synthesis of 2-aryl benzothiazoles from gem-dibromomethylarenes using 2-aminoarylthiols is described. Benzothiazoles were obtained in high chemical yields under mild conditions. This transformation would facilitate synthesis by short reaction times, large-scale synthesis, easy and quick isolation of the products, which are the main advantages of this procedure. (C) 2011 Published by Elsevier Ltd.
N- (L-ALKYL-2- PHENYLETHYL) -CARBOXAMIDE DERIVATIVES AND USE THEREOF AS FUNGICIDES