908150-07-2

Upstream product

• 10313-60-7 3,4-dimethoxyphenylacetyl chloride 
• 908150-04-9 Oxalic acid (5R,6R,9S)-9-acetoxy-1-[2-(3,4-dimethoxy-phenyl)-acetyl]-1-aza-spiro[4.4]non-7-en-6-yl ester methyl ester 
• 908149-94-0 (1S,4R,5S)-N-(3,4-dimethoxyphenylacetyl)-1-acetoxy-6-azaspiro[4.4]non-2-en-4-ol 
• 908149-96-2 (4S,5S)-N-(3,4-dimethoxyphenylacetyl)-4-acetoxy-6-azaspiro[4.4]non-1-ene 
• 908150-05-0 2-(3,4-Dimethoxy-phenyl)-1-((5S,9S)-9-hydroxy-1-aza-spiro[4.4]non-6-en-1-yl)-ethanone 
• 908150-03-8 (5R,6R,9S)-6,9-Diacetoxy-1-aza-spiro[4.4]non-7-ene-1-carboxylic acid tert-butyl ester 
• 908149-92-8 1,4-diacetoxy-6-azaspiro[4.4]non-2-ene 
• 908149-93-9 Acetic acid (5S,6S,9R)-9-hydroxy-1-aza-spiro[4.4]non-7-en-6-yl ester 
• 908150-06-1 (S)-1-[2-(3,4-Dimethoxy-phenyl)-acetyl]-1-aza-spiro[4.4]non-8-en-6-one 

Downstream Products

• 908150-08-3 2-(3,4-Dimethoxy-phenyl)-1-((5S,6S)-6-hydroxy-1-aza-spiro[4.4]non-7-en-1-yl)-ethanone 

Relevant academic research and scientific papers

Application of the photocyclization reaction of 1,2-cyclopenta-fused pyridinium perchlorate to formal total syntheses of (-)-cephalotaxine

Two strategies for the formal total synthesis of (-)-cephalotaxine, based on pyridinium salt photochemistry, are described. The routes begin with photocyclization reaction of 1,2-cyclopenta-fused pyridinium perchlorate. This process efficiently and regios