91791-19-4

Upstream product

• 91791-14-9 6-n-propyl-1,4-dioxa-8-thiaspiro<4.5>decane 8,8-dioxide 
• 1072-72-6 Tetrahydrothiopyran-4-one 
• 91791-12-7 6-allyl-1,4-dioxa-8-thiaspiro<4,5>-decane 8,8-dioxide 
• 91791-07-0 6-Allyl-1,4-dioxa-8-thia-spiro[4.5]decane 
• 97694-65-0 3-allyltetrahydrothiopyran-4-one 
• 4160-61-6 3-methoxycarbonyltetrahydropyran-4-one 

Downstream Products

• 24105-07-5 2-propylcyclopent-2-enone 
• 24105-08-6 5-propyl-2-cyclopentenone 
• 91791-22-9 2-n-propyl-3-cyclopentenone 

Relevant academic research and scientific papers

A Regioselective Synthesis of Cyclopentenones from 4-Thianone

Alkyl-substituted 3-cyclopentenones 4 and 5 were prepared in moderate to good yields starting from 4-thianone by the selective alkylation and Ramberg-Baecklund-type reactions.One route starts with 6-alkyl-1,4-dioxa-8-thiaspirodecane 8,8-dioxides (8) and another with 7-alkyl-1,4-dioxa-7-(p-tolylsulfonyl)-8-thiaspirodecane 8,8-dioxides (15), followed by acid-catalyzed cleavage of the 1,3-dioxolane ring of 1,4-dioxaspironon-7-enes 9 and 16 to afford 4 and 5.

TETRAHYDROTHIOPYRAN-4-ONE. A USEFUL 5 C SYNTHON FOR THE SYNTHESIS OF 3-CYCLOPENTENONES

2-Alkyl-3-cyclopentenones were prepared in moderate yields starting from tetrahydrothiopyran-4-one by the one-pot Ramberg-Baecklung reaction of 6-alkyl-1,4-dioxa-8-thiaspirodecane-8,8-dioxides, followed by acid catalyzed de-dioxolanation.