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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 35, Number 9
BKCSDE 35(9)
September 20, 2014 

Synthesis of Organic Carbonates with Alkyl/aryl 4,5-dichloro-6-oxopyridazine-1(6H)- carboxylates and ROH/AlCl3 under Ambient Condition
Gi Hyeon Sung, Bo Ram Kim, Ki Eun Ryu, Jeum-Jong Kim*, Yong-Jin Yoon*
Organic carbonate, Alkoxide equivalent, Alcohol-aluminum adduct, Alkyl/aryl 4,5-dichloro-6- oxopyridazine-1(6H)-carboxylates, 4,5-Dichloropyridazin-3(2H)-one
We demonstrated the synthesis of organic carbonates using alkyl/aryl 4,5-dichloro-6-oxopyridazine-1(6H)- carboxylates and alcohol in the presence of aluminum chloride. Alkyl/aryl 4,5-dichloro-6-oxopyridazine- 1(6H)-carboxylates were reacted with alcohol in the presence of AlCl3 in toluene at room temperature to afford the corresponding unsymmetric and symmetric organic carbonates in good to excellent yields. These are efficient and convenient processes. Alkyl/aryl 4,5-dichloro-6-oxopyridazine-1(6H)-carboxylates are solid, stable and non-toxic CO2/CO2R(Ar) source. It is noteworthy that the reaction is carry out under an ambient and acidic conditions, the easy-to prepare and readily available starting materials and the quantitative isolation of reusable 4,5-dichloropyridazin-3(2H)-one.
2758 - 2764
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