1225-05-4

Upstream product

• 2919-30-4 (+/-)-3-Methoxy-18-methylestra-1,3,5(10),8-tetraen-17β-ol 
• 632-38-2 (+/-)-3-hydroxy-13r-methyl-(14tH)-11,12,13,14,15,16-hexahydro-11H-cyclopenta[a]phenanthren-17-one 
• 88599-97-7 17β-dihydroequilenin-3-benzoate 
• 1229-32-9 (+/-)-3-methoxyestra-1,3,5⁽¹⁰⁾,6,8-pentaen-17-one 
• 474-86-2 d,l-equilin 
• 21611-23-4 (+/-)-8α-hydroxy-3-methoxyestra-1,3,5(10),9(11)-tetraen-17-one 
• 13944-54-2 rac-8α,17β-dihydroxy-3-methoxy-oestra-1,3,5(10),9(11)-tetraen 
• 2911-86-6 (+/-)-3-methoxyestra-1,3,5⁽¹⁰⁾,8-tetraen-17-one 
• 6030-80-4 3-Hydroxy-1,3,5⁽¹⁰⁾,7-estratetraen-17-one 3-benzoate 
• 604-58-0 equilenin-3-benzoate 

Relevant academic research and scientific papers

B-ring aromatization of estrogen derivatives

A noval method of B-ring aromatization of steroid derivatives is reported. Addition of BrCl in methanol to a non-aromatic B-ring double bond results in a rapid double elimination generating the aromatic B-ring. This procedure represents an effective method for conversion of an equilin to an equilenin nucleus.