28908-28-3

Upstream product

• 83718-80-3 (S)-2-(1-Methoxy-1-methyl-ethyl)-6,10-dimethyl-spiro[4.5]deca-1,6-diene 
• 155528-07-7 (+)-(3R,4E)-3-(tert-butyldimethylsilyloxy)hex-4-enal 
• 120-92-3 cyclopentanone 
• 52528-52-6 (5S,10R)-6,10-Dimethyl-spiro[4.5]deca-1,6-diene-2-carboxylic acid methyl ester 
• 928203-31-0 6-(tert-butyl-dimethyl-silanyloxy)-10-methyl-spiro[4.5]dec-1-ene-2-carboxylic acid methyl ester 
• 928203-27-4 6-(tert-butyl-dimethyl-silanyloxy)-10-methyl-spiro[4.5]decan-1-one 
• 928203-22-9 2-[3-(tert-butyl-dimethyl-silanyloxy)-hex-4-enoyl]-cyclopentanone 
• 928203-21-8 2-[3-(tert-butyl-dimethyl-silanyloxy)-1-hydroxy-hex-4-enyl]-cyclopentanone 
• 928203-26-3 10-(tert-butyl-dimethyl-silanyloxy)-6-methyl-spiro[4.5]dec-7-en-1-one 
• 928203-25-2 tert-butyl-dimethyl-(2-propenyl-2,3,4,5,6,7-hexahydro-cyclopenta[b]pyran-4-yloxy)-silane 
• 928203-32-1 6-hydroxy-10-methyl-spiro[4.5]dec-1-ene-2-carboxylic acid methyl ester 
• 928203-33-2 6-methyl-10-methylene-spiro[4.5]dec-1-ene-2-carboxylic acid methyl ester 
• 928203-28-5 6-methyl-10-oxo-spiro[4.5]dec-1-ene-2-carboxylic acid methyl ester 
• 928203-23-0 2-(3-hydroxy-hex-4-enoyl)-cyclopentanone 

Relevant academic research and scientific papers

Claisen rearrangement strategy in alkenyl dihydropyran leading to total synthesis of (+)-α-vetispirene and (-)-agarospirol

Total synthesis of (+)-α-vetispirene and (-)-agarospirol based on a Claisen rearrangement has been achieved. This is the first example of a Claisen rearrangement in an enantio-enriched alkenyl bicyclic dihydropyran system with perfect asymmetric transmission. Copyright

Silicon in Organic Synthesis. 25. Thermolysis and Desiliconation-Alkylation of ethylenes as a Route to Spirocyclic Sesquiterpenes

Three routes to methylene>cyclohexanes and -2-cyclohexenes have been developed.The condensations of lithium with cycloalkyl carboxaldehydes and of α-lithio selenides with 1-(trimethylsilyl)cyc