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1,3-dichloropropene as a source of the 1,3-dianion derived from propene: Synthesis of unsaturated 1,5-diols and dihydropyrans

✍ Scribed by Albert Guijarro; Miguel Yus

Publisher
Elsevier Science
Year
1994
Tongue
French
Weight
617 KB
Volume
50
Category
Article
ISSN
0040-4020

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✦ Synopsis

A-?llercaIaionof13didd~(l. co. l/i z/E mixture) with 80 excess of lithium powdcx and a catalytic amount of 4&di-terz-butylbiphenyl (JYI'BB, 5 md %) in the presena of m dscolopbile m. &CO. (CH&C!O, (CH &CO. BuCHO. Me&I] in THF at 0°C affordtb after hychdysiswithwam.tbe~~ lJ_dids 3 a a z/E mixbe or diaihne (a-4. Treatment of isdsbrd canpow& (Z)-3 with 83% phaapbic acid gives the expeaal dihydmpymns 5.

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