1421369-93-8

Upstream product

• 106-39-8 bromochlorobenzene 
• 4746-97-8 cyclohexanedione monoethylene ketal 
• 126991-59-1 8-(4-chlorophenyl)-1,4-dioxaspiro[4.5]decan-8-ol 
• 126991-60-4 4-(4-chlorophenyl)cyclohex-3-enone monoehtylene ketal 
• 407-25-0 trifluoroacetic anhydride 
• 529-34-0 3,4-dihydronaphthalene-1(2H)-one 
• 38858-72-9 1-trimethylsiloxy-3,4-dihydronaphthalene 
• 25253-51-4 4-(4-chlorophenyl)cyclohexanone monoehtylene ketal 
• 14472-80-1 4-(4-chlorophenyl)cyclohexan-1-one 
• 1409956-58-6 2-(4-(4-chlorophenyl)-1-hydroxycyclohexyl)-3,4-dihydronaphthalen-1(2H)-one 

Downstream Products

• 1409956-73-5 trans-2-(4-(4-chlorophenyl)cyclohexyl)-3,4-dihydronaphthalen-1(2H)-one 
• 1409956-79-1 cis-2-(4-(4-chlorophenyl)cyclohexyl)-3,4-dihydronaphthalen-1(2H)-one 
• 1409956-62-2 2-(4-(4-chlorophenyl)cyclohex-1-en-1-yl)-3,4-dihydronaphthalen-1(2H)-one 

Relevant academic research and scientific papers

A novel process for synthesis of atovaquone

A stereospecific efficient process for synthesis of atovaquone i.e. trans-2-[4-(4-chlorophenyl)cyclohexyl ]-3-hydroxy-1,4-naphthalenedione and its cis isomer from commercially available raw materials such as α-tetralone and 4-(4-chlorophenyl)cyclohexanone

IMPROVED SYNTHESIS OF 2-(4-(4-CHLOROPHENYL) CYCLOHEX-1-ENYL) -3, 4-DIHYDRONAPHTHALEN-1 (2H)-ONE; AN INTERMEDIATE FOR ATOVAQUONE

A process for preparation of 2-(4-(4-chlorophenyl) cyclohex-l-enyl)-3,4-dihydronaphthalen- 1(2H)-one (V), key intermediate for synthesis of Atovaquone [I]. The process for preparation of compound(V) comprising of the steps of; i) Reaction of 2-(4-(4-chlorophenyl)-1-hydroxycyclohexyl)-3,4-dihydronaphthalen- 1(2H)-one (IV) with trifluro acetic anhydride in presence of base in organic solvent to yield compound of formula (XIa) ii) Elimination of trifluoroacetyl functionality of compound (XIa) in organic solvent and in presence of organic base to give compound of formula (V). The invention also provides a Process for preparation of compound(XIa) comprising of the steps of; i) reaction of 2-(4-(4-chlorophenyl)-l-hydroxy cyclohexyl)-3,4-dihydronaphthalen- 1(2H)-one (IV) with trifluro acetic anhydride in presence of organic base in organic solvent. A further process is provided for preparation of compound(V) from compound (XIa) comprising elimination reaction of trifluoroacetyl functionality compound (XIa) in organic solvent and in presence of organic base.