166545-82-0

Upstream product

• 166545-79-5 8,8-Dimethyl-3-phenyl-8,9-dihydro-6H-2,7-dioxa-11-thia-4,10-diaza-benzo[b]fluoren-1-one 
• 200959-69-9 3-Benzoylamino-7,7-dimethyl-7,8-dihydro-5H-pyrano[4,3-b]thieno[3,2-e]pyridine-2-carboxylic acid ethyl ester 
• 98-88-4 benzoyl chloride 
• 123990-50-1 2-chloro-7,7-dimethyl-7,8-dihydro-5H-pyrano[4,3-b]pyridine-3-carbonitrile 
• 144291-93-0 7,7-Dimethyl-2-thioxo-1,5,7,8-tetrahydro-2H-pyrano[4,3-b]pyridine-3-carbonitrile 
• 200959-66-6 ethyl 3-amino-7,7-dimethyl-7,8-dihydro-5H-pyrano[4,3-b]thieno[3,2-e]pyridine-2 carboxylate 

Downstream Products

• 166545-87-5 8,8-Dimethyl-3-phenyl-8,9-dihydro-2H,6H-7-oxa-11-thia-2,4,10-triaza-benzo[b]fluoren-1-one 

Relevant academic research and scientific papers

Synthesis of new condensed thieno[2,3-b]pyridines containing pyrimidine and imidazole rings

Two different convenient methods have been developed for the synthesis of condensed thieno[2,3-b]pyridines. The intramolecular cyclization of 3-amino-2-hydrazinocarbonyl-7,7-dimethyl-7,8-dihydo-5H-pyrano[3,4-e]-thieno[2,3- b]pyridine was carried out to give 7,7-dimethyl-2-oxo-1,2,6,7-tetrahydro-9H-pyrano[3′,4′-e]- imidazo[4″,5″:2,3]thieno[5,4-b]pyridine, which is the first representative of a new heterocyclic system. 1997 Plenum Publishing Corporation.

SYNTHESIS OF DIHYDRO-1OH-PYRANOPYRIDO-THIENOOXAZINES AND PYRIMIDINES

Convenient methods have been developed for synthesizing dihydro-10H-pyrano-pyridothieno-oxazines and -pyrimidines.Optimum conditions have been established for the chlorodeoxygenation of condensed thieno-pyrimidin-4-ones.