105141-42-2

Upstream product

• 1035-69-4 androst-4,9⁽¹¹⁾-dien-3,17-dione 
• 104203-24-9 C₃₁H₃₇NO₃S₂ 
• 104203-29-4 21-Acetoxy-20-benzoylamino-4,9⁽¹¹⁾,17⁽²⁰⁾-pregnatrien-3-on 
• 1199-01-5 2-phenylazlactone 
• 104203-28-3 C₃₂H₃₉NO₃S₂ 
• 113408-08-5 17-<5-Oxo-2-phenyl-1,3-oxazol-4(5H)-yliden>-4,9(11)-androstadien-3-on-ethylendithioacetal 
• 104203-26-1 20-Benzoylamino-21-hydroxy-4,9⁽¹¹⁾,17⁽²⁰⁾-pregnatrien-3-on-ethylendithioacetal 
• 104203-22-7 4,9⁽¹¹⁾-Androstadien-3,17-dion-3-ethylendithioacetal 

Downstream Products

• 105141-48-8 17β-(2-Phenyl-1,3-oxazol-4-yl)-4,9(11)-androstadien-3-on 

Relevant academic research and scientific papers

New Synthesis of the Corticosterone Side-Chain

Condensation reactions between azlactone 2 and 17-ketosteroids 1 followed by opening of the azlactone ring with sodium methanolate yields methyl 20-benzoylamino-17(20)-pregnen-21-oates 6.Reduction of the ester and subsequent hydrolysis produce compounds with the corticosterone side-chain as well as a ring-closed product of new type.