94930-52-6

Upstream product

• 75-77-4 chloro-trimethyl-silane 
• 16807-60-6 3-methoxycyclohex-2-en-1-one 

Downstream Products

• 94930-51-5 methyl 2-formyl-4-(trimethylsiloxy)-6-methoxybenzoate diethyl acetal 
• 916978-77-3 6'-bromo-2-(diphenyl-phosphinoyl)-6-methoxy-2'-nitro-biphenyl-4-ol 
• 916978-78-4 6'-bromo-2-(dicyclohexyl-phosphinoyl)-6-methoxy-2'-nitro-biphenyl-4-ol 
• 94930-65-1 2-Diethoxymethyl-4,6-dimethoxy-benzoic acid methyl ester 
• 1017280-61-3 O₂N(Cl)C₆H₃C₆HMe(OMe)(OH)SnPh₃ 

Relevant academic research and scientific papers

Synthesis of 4,4-Disubstituted Cyclohexenones. Part 3. The Reaction of 1,3-Bis(trimethylsilyloxy)cyclohexa-1,3-dienes with Dienophiles. An Unexpected Rearrangement of the Adducts from the reactions with 2-Chloroacrylonitrile

The cycloaddition of 2-chloroacrylonitrile to 1,3-bis(trimethylsilyloxy)cyclohexa-1,3-dienes (3) occurs in good yield to give after base-catalysed silyl enol ether cleavage the adducts (4).Cycloaddition with arylonitrile occurs in moderate yield, while more reactive dienophiles such as nitroethylene and E-nitroacrylate lead to adducts which rapidly rearrange or decompose.The cycloaddition of 2-chloroacrylonitrile to diene (3b) in toluene, hexane, or dichloromethane in the presence of Lewis acids such as Me2AlCl or TiCl4 occurs in high yield at - 78 deg C with great syn-selectivity and a slight preference for the exo-nitrile stereochemistry.Desilylation of adducts (4a) and (4b) gave respectively the alcohols (8a) and (8b) and the novel bicyclic ether rearrangement products (9a) and (9b) whose yield could be maximised by carrying out the desilylation with Bu4NF in the presence of 4 Angstroem molecular sieves.The diols (14a) and (14b) prepared by borohydride reduction of ketones (4) did not undergo this rearrangement thereby confirming that the presence of the carbonyl group in (4) was essential.Borane-THF reduction of the alkoxyenones (9) caused the unexpected formation of the cyclohexenes (15).Lewis acid-catalysed cycloaddition of 2-chloronitrile to the methoxysilyloxydiene (16a) gave the adduct (17) in moderate yield with concomitant formation of rearrangement products (18) and (19).The corresponding addition to (16b) was not promising.

Synthesis of Functionalized Hydroxyphthalides and Their Conversion to 3-Cyano-1(3H)-isobenzofuranones. The Diels-Alder Reaction of Methyl 4,4-Diethoxybutynoate and Cyclohexadienes

Several methods have been used in the preparation of functionalized hydroxyphthalides.Metalation of N,N-diethyl-3-methoxybenzamide, followed by reaction with dimethylformamide and hydrolysis, furnished 3-hydroxy-4-methoxy-1(3H)-isobenzofuranone in 52perce