138680-62-3

Upstream product

• 98-88-4 benzoyl chloride 
• 138680-61-2 (+/-)-(7S,8R)-2-tert-butyl-4-hydroxy-2,3-isopropylidenedioxyspiro<4.4>nonan-1-one 
• 2175-91-9 6,6'-dimethyl fulvene 
• 35059-40-6 t-butylcyclopentadiene 
• 39190-45-9 cis-4,5-di(bromomethyl)-2,2-dimethyl-1,3-dioxolane 
• 138752-05-3 cis-4,5-di(iodomethyl)-2,2-dimethyl-1,3-dioxolane 
• 138680-54-3 (+/-)-(7S,8R)-2-tert-butyl-2,3-isopropylidenedioxyspiro<4.4>nona-1,3-diene 
• 138680-54-3 (+/-)-(7S,8R)-3-tert-butyl-2,3-isopropylidenedioxyspiro<4.4>nona-1,3-diene 
• 138680-58-7 (+/-)-(7S,8R)-2-tert-butyl-4-hydroxy-7,8-isopropylidenedioxyspiro<4.4>non-2-en-1-one 
• 138680-60-1 (+/-)-(7S,8R)-2-tert-butyl-7,8-isopropylidenedioxyspiro<4.4>non-2-ene-1,4-dione 
• 138680-56-5 (+/-)-(7S,8R)-2-tert-butyl-1-hydroxy-7,8-isopropylidenedioxyspiro<4.4>non-2-en-4-one 

Relevant academic research and scientific papers

Studies on the Synthesis of Ginkgolides. Rapid Construction of the Spirononane A and B Rings

The functionalised spirononane 30 is available from tert-butylcyclopentadiene 16 via spiroalkylation with 12b to give 17/18, followed by singlet oxygenation/aldolisation to the mixture of 21, 22, 25 and 26.Oxidation of the mixture gave two enediones