Picolyl chloride → HCID 20432090, compound

Participants

Reaction Steps

Freshly liberated 2-picolinyl chloride was secured by extracting a mixture of 1.48 g potassium carbonate and 1.64 g 2-picolinyl chloride in 10 ml water with methylene chloride. The extract was dried (MgSO4) and concentrated (rotary evaporator). To the residue was added 10 ml dry dimethylformamide and the remaining methylene chloride was removed by further evaporation. The resulting solution was then added to a mixture of 10 mmol of the sodium salt of tetrahydro-5-(hydroxymethyl)-2,5-dimethyl-2-furancarbonitrile as a mixture of cis-trans isomers in 10 ml dry dimethylformamide prepared as described in Embodiment 10 above. The reaction progress and workup also followed the procedure for Embodiment 10 with the exception that crude product was secured from both pentane and ether extraction of the ice-quenched mixture. The crude product, which consisted of both cis- and trans-isomers, was purified and isomerically separated by preparative hplc using a silica gel column and ethyl acetate:pentane (60:40) as eluent. The cis (Z)-isomer amounted to 0.69 g bp not determined.

Provenance & Evidence