104804-79-7

Upstream product

• 824-79-3 sodium 4-methylbenzenesulfinate 
• 107-21-1 ethylene glycol 
• 104804-78-6 2-(p-tolylsulfonyl)-4-thianone 
• 57242-69-0 2,3-dihydro-4H-thiopyran-4-one 
• 107617-10-7 7-(Toluene-4-sulfonyl)-1,4-dioxa-8-thia-spiro[4.5]decane 

Downstream Products

• 104804-83-3 7-n-pentyl-7-(p-tolylsulfonyl)-1,4-dioxa-8-thiaspiro<4.5>-decane 8,8-dioxide 
• 104804-84-4 7-<5(methoxycarbonyl)pentyl>-7-(p-tolylsulfonyl)-1,4-dioxa-8-thiaspiro<4.5>-decane 8,8-dioxide 
• 104804-81-1 7-benzyl-7-(p-tolylsulfonyl)-1,4-dioxa-8-thiaspiro<4.5>-decane 8,8-dioxide 
• 104804-85-5 7-(2-phenylethyl)-7-(p-tolylsulfonyl)-1,4-dioxa-8-thiaspiro<4.5>-decane 8,8-dioxide 
• 104804-82-2 7-allyl-7-(p-tolylsulfonyl)-1,4-dioxa-8-thiaspiro<4.5>-decane 8,8-dioxide 
• 2758-18-1 3-Methyl-2-cyclopenten-1-one 
• 104804-88-8 1,4-dioxa-7-(2-phenylethyl)spiro<4.4>non-7-ene 
• 104804-92-4 3-(2-phenylethyl)-2-cyclopentenone 
• 104804-90-2 3-(2-phenylethyl)-3-cyclopentenone 
• 104804-80-0 7-methyl-7-(p-tolylsulfonyl)-1,4-dioxa-8-thiaspiro<4.5>-decane 8,8-dioxide 

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.

REGIOSELECTIVE ALKYLATION AND THE RAMBERG-BAECKLUND TYPE REACTION OF α-(p-TOLYLSULFONYL)THIANE S,S-DIOXIDE. A NEW ROUTE TO THE SYNTHESIS OF 3-ALKYL-3-CYCLOPENTENONES

A new general olefin synthesis, via regioselective alkylation of α-(p-tolylsulfonyl)thiane S,S-dioxide, 1,4-dioxa-7-p-tolylsulfonyl-8-thiaspirodecane 8,8-dioxide, and subsequent Ramberg-Baecklung type elimination of p-toluenesulfinate and SO2, is here applied to the synthesis of 3-alkyl-3-cyclopentanones.