反应详情

1.94 g. of 6-[(6-oxo-3-methyl-2-hexenyl)-oxy]-2,3-dihydrobenzofuran are dissolved in 80 ml. of absolute diethyl ether and treated dropwise at 0° C. under nitrogen over a period of 20 minutes with 5 ml. of a 2-M solution of tertbutyl lithium in pentane. The mixture is then poured into ice-cold saturated aqueous ammonium chloride solution and extracted twice with diethyl ether. The extracts are dried over sodium sulfate and evaporated. There is obtained crude 6-[(6-hydroxy-3,7,7-trimethyl-2-octenyl)-oxy]-2,3-dihydrobenzofuran which is used in the process without further purification.

1. additionThe mixture is then poured into ice-cold saturated aqueous ammonium chloride solution
2. extractionextracted twice with diethyl ether
3. dry with materialThe extracts are dried over sodium sulfate
4. customevaporated