... For example, Ethyl 2-amino- 4- methyl-1, 3-selenazole-5-carboxylate was obtained in 87% yield whereas 4( 4- methoxyphenyl )-2 -amino-1, 3-selenazole-5-carboxylate was produced in 95% yield. The reactions ... 4- CH3 ; 4- CH2CH3 ; 4- OCH2Ph ; 4- OCH3 ; 4- OCH2CH3 ; 4- Cl;R1 = 4- CH3 ; 4- Cl ; 4- F ; 4- I ; 4- nC 4 H9;3-Cl; Synthesis of 3, 4, 5- substituted furan-2(5H)-ones, in presence of β-CD as a supra molecular catalyst in water. Initially, a model ... conditions, changing the amine component. 4- Methyl; 4- methoxy; 3, 4- dimethoxy; 4- chloro; 4- fluoro; 4- n butyl anilines, benzyl amine, 3-methoxy benzyl amine and 3-bromo benzyl amine were also utilized...