NISCAIR Online Periodicals Repository Collection: IJC-B Vol.45B(02) [February 2006]

Microwave assisted convenient and facile regeneration of carbonyl compounds from semicarbazones, phenylhydrazones and tosylhydrazones using phosphoric acid in solvent-free conditions

Sun, 29 Jan 2006 22:58:59 GMT

Title: Microwave assisted convenient and facile regeneration of carbonyl compounds from semicarbazones, phenylhydrazones and tosylhydrazones using phosphoric acid in solvent-free conditions

Authors: Banerjee, Krishna; Mitra, Alok Kumar; Patra, Amarendra

Abstract: Microwave irradiation of semicarbazones, phenylhydrazones and tosylhydrazones of carbonyl compounds with phosphoric acid under solvent-free conditions provides a fast, efficient and simple method for regeneration of carbonyls in excellent yields.

Page(s): 537-539

Synthesis of 2-(2-phenylethyl)chromones

Sun, 29 Jan 2006 22:58:59 GMT

Title: Synthesis of 2-(2-phenylethyl)chromones

Authors: Goel, Sharda; Shashi; Makrandi, J K

Abstract: 2-(2-Phenylethyl)chromones have been obtained by selective reduction of double bond of the styryl group in 2-styrylchromones involving catalytic hydrogen transfer reaction using ammonium formate in the presence of Pd-C.

Page(s): 535-536

Synthesis and characterization of a new chromanoisoxazole

Sun, 29 Jan 2006 22:58:59 GMT

Title: Synthesis and characterization of a new chromanoisoxazole

Authors: Murthy, Y L N; Nanda, Rani; Kumar, K Ravi; Swamy, G Y S K

Abstract: The synthesis of a new chromanoisoxazole 4 has been reported. Acylation of resorcinol using anhyd. ZnCl₂ and gl. acetic acid affords resacetophenone, which on nuclear prenylation with isoprene/PPA/xylene gives chroman 2. Compound 2 on treatment with p-chlorobenzaldehyde/ ethanol/KOH yields a chalcone 3. The product 3 on further treatment with hydroxylamine hydrochloride results in the formation of the chromanoisoxazole 4.The structure of 4 has been characterized by spectroscopic and crystallographic techniques.

Page(s): 532-534

Synthesis of 5-arylidene-2-aryl-3-(benzotriazoloacetamidyl)-1,3-thiazolidin-4-ones as analegesic and antimicrobial agents

Sun, 29 Jan 2006 22:58:59 GMT

Title: Synthesis of 5-arylidene-2-aryl-3-(benzotriazoloacetamidyl)-1,3-thiazolidin-4-ones as analegesic and antimicrobial agents

Authors: Asati, K C; Srivastava, S K; Srivastava, S D

Abstract: Benzotriazole on reaction with ethyl chloroacetate affords 1, which on treatment with hydrazine hydrate yields 2. Condensation of N¹(acetohydrazido)benzotriazole 2 with various carbonyls gives arylidene acetohydrazido benzotriazoles 3 which on cycloaddition with mercaptoacetic acid yields the corresponding 4-thiazolidinones 4. which on reaction with various carbonyl compounds afford 5-arylidene-2-aryl-benzotriazoloacetamidyl-1,3-thiazolidin-4-ones 5.

Page(s): 526-531