147235-54-9

Upstream product

• 80691-81-2 2,5-diamino-thiophene-3,4-dicarboxylic acid diethyl ester 
• 603-35-0 triphenylphosphine 

Downstream Products

• 1027654-41-6 2,5-bis-m-tolyliminomethyleneamino-thiophene-3,4-dicarboxylic acid diethyl ester 
• 1027591-44-1 2,5-bis-(4-chloro-phenyliminomethyleneamino)-thiophene-3,4-dicarboxylic acid diethyl ester 
• 1026366-09-5 2,5-bis-p-tolyliminomethyleneamino-thiophene-3,4-dicarboxylic acid diethyl ester 
• 147235-63-0 diethyl 5-(1-ethoxy-1-phenylmethyleneamino)-2-(triphenylphosphoranylideneamino)thiophen-3,4-dicarboxylate 
• 147235-55-0 ethyl 4-oxo-2-phenyl-6-(triphenylphosphoranylideneamino)-4H-thieno<2,3-d><3,1>-oxazin-5-carboxylate 

Relevant academic research and scientific papers

Application of bis(iminophosphorane) in heterocyclic synthesis: New entries to symmetrically or unsymmetrically substituted thieno[2,3-d:5,4-d′] dipyrimidine-4,5(3H,6H)-diones

The bis(carbodiimides) 4, obtained from bis-aza-Wittig reactions of bis(iminophosphorane) 3 with 2 equiv of aromatic isocyanates, were reacted with secondary amine to give symmetrically substituted 2,7-diaminothieno[2,3-d:5,4- d′]dipyrimidine-4,5(3H,6H)-d

A new, general approach for the synthesis of heteroannulated 3,1-oxazin-4-ones

β-(N-Triphenylphosphoranyliden)-enamino esters afford the synthetically useful heteroannulated 3,1-oxazin-4-ones with aroyl chlorides in different solvents. The reaction proceeds in one step and in high yields and appears to be independent of the reactivity of the heterocyclic substrate.