mp 87 8 u00b0 88 8 u00b0 c recrystallizated from toluene it had mp 88 0 u00b0 89 3 u00b0 c compound 3f was obtained in 68 yield mp 89 6 u00b0 90 8 u00b0 c which has mp 90 1 u00b0 91 0 u00b0 c on recrystallization from toluene compound 3g was obtained in 55 yield with mp 81 4 u00b0 82 4 u00b0 c recrystallization from toluene gave material with mp 80 4 u00b0 80 9 u00b0 c to a mixture of 2 50 0 g and acetic anhydride 200 ml was added concentrated sulfuric acid 1 0 ml the resulting suspension was heated on the steam bath for 3 hours on cooling the reaction mixture in an ice bath for several hours crystals formed the residue was diluted with chloroform 500 ml and further chilled the crystals were collected washed with chloroform and dried on the filter to give 5 39 6 g 87 m p 154 3 u00b0 156 0 u00b0 c which was used without further purification for the preparation of 6 a mixture of 5 20 g the appropriate fatty alcohol 100 g and n n dimethylformamide 100 ml were stirred at 110 u00b0 c in a pre heated oil bath for 3 hours the cooled solution was evaporated in high vacuum at 70 u00b0 c the residue was dissolved in ethyl acetate 500 ml and the dark solution extracted twice with water the ethyl acetate solution was then extracted three times with saturated sodium bicarbonate solution 150 ml the bicarbonate extracts were washed once with ethyl acetate then adjusted to ph 2 by the addition of concentrated hcl the acidic solution was extracted with three portions of ethyl acetate 200 ml the ethyl acetate solution back washed once with water dried.