7 0 hz 4 02 t 1h j 7 0 hz exchanges with d20 4 69 broad s 2h 6 92 d 2h j 8 5 hz 7 00 dd 1h j 7 5 and 2 0 hz 7 24 d 1h j 7 5 hz 7 29 d 2h j 8 5 hz 7 58 d 1h j 2 0 hz ir cdcl 3 3420 cm 1 following the procedure of example 104 but using 1 p chlorobenzyl 1 4 i propyl phenyl hydrazine hydrochloride and methyl 2 2 dimethyl 4 oxo 5 n butylthiopentanoate as starting materials followed by hydrolysis at reflux gave the title compound m p 129 u00b0 130 u00b0 to a mixture of 461 mg of 1 p chlorobenzyl 1 4 i propyl phenyl hydrazine hydrochloride and 121 mg of anhydrous sodium acetate in 2 5 ml of anhydrous toluene was added 1 24 ml of glacial acetic acid after 15 min a solution containing 336 mg of methyl 2 2 dimethyl 4 oxo 5 cyclohexylthio pentanoate in 0 5 ml of toluene was added and the reaction mixture stirred for 24h at room temperature the reaction was then diluted with ether washed with ln naoh 2 u00d7 h 2 o and brine and dried over mgso 4.