122887-13-2

Upstream product

• 122887-09-6 5-Phenyl-3,3a-dihydro-pyrazolo[4,3-d][1,3]thiazine-7a-carboxylic acid methyl ester 
• 122887-10-9 2-(1,3-Dioxo-1,3-dihydro-isoindol-2-yl)-1-oxo-2a-phenyl-2,2a,7,7a-tetrahydro-1H-3-thia-5,6,7b-triaza-cyclobuta[e]indene-4a-carboxylic acid methyl ester 
• 78409-10-6 5-methoxycarbonyl-2-phenyl 6H-1,3-thiazine 
• 122887-12-1 (2R,2aS,4aR,7aS)-2-(1,3-Dioxo-1,3-dihydro-isoindol-2-yl)-1-oxo-2a-phenyl-2,2a,5,7a-tetrahydro-1H-3-thia-5,6,7b-triaza-cyclobuta[e]indene-4a-carboxylic acid methyl ester 
• 122887-10-9 (2R,2aS,4aR,7aR)-2-(1,3-Dioxo-1,3-dihydro-isoindol-2-yl)-1-oxo-2a-phenyl-2,2a,7,7a-tetrahydro-1H-3-thia-5,6,7b-triaza-cyclobuta[e]indene-4a-carboxylic acid methyl ester 
• 122887-09-6 (3aR,7aR)-5-Phenyl-3,3a-dihydro-pyrazolo[4,3-d][1,3]thiazine-7a-carboxylic acid methyl ester 

Relevant academic research and scientific papers

Une application du cycle pyrazoline a la lactamisation et a la formylation de 6H thiazines-1,3

A pyrazoline ring is used as a masking, a stereodirecting, and a latent formyl group in the synthesis of 7-amino-4-formyl cephems from 6H-1,3-thiazines.Keywords: thiazine, cephem, pyrazoline, benzeneseleninic anhydride.

OXIDATIVE RING OPENING OF 2-PYRAZOLINES. APPLICATION TO LACTAMISATION AND FORMYLATION OF 1,3-6H-THIAZINES.

Benzeneseleninic anhydride allows oxidative ring opening of 2-pyrazolines to α,β-unsaturated carbonyl compounds.Thus, a pyrazoline ring may be used as a masking, a stereodirecting and a latent formyl group in the synthesis of 7-amino 4-formyl cephem from 1,3-6H-thiazine.