organic layer was then concentrated in vacuum to yield 110 g of compound 2 as off white solid in particular this compound 2 is a preferred embodiment of the novel intermediate of the present invention 1 h nmr cdcl 3 400 mhz u03b4 7 33 7 31 d j 8 0 hz 1h 7 18 7 14 t j 8 0 hz 1h 6 73 6 71 d j 8 0 hz 1h 3 91 s 3h 3 82 s 3h 3 10 3 07 m 2h 2 79 2 75 m 1h 2 75 2 70 m 1h 2 47 2 41 m 1h 13 c nmr cdcl 3 100 mhz u03b4 178 9 176 7 173 3 156 8 132 7 127 5 120 4 119 4 108 7 100 5 56 3 52 6 36 0 34 5 25 8 a mixture of 340 g of compound 2 and 54 g of lithium chloride licl was dissolved in dmac h 2 o 1 7 l 68 ml the reaction solution was heated to 100 u00b0 c for 2 h and then cooled to room temperature 1 5 l of saturated brine and 1 l of ethyl acetate were added to begin partitioning the organic layer separated was washed using 4 5 l of saturated brine the washed organic layer was concentrated in vacuum to yield 225 g of compound 3 as orange solid an amount of 225 g of compound 3 was dissolved in 2 25 l of dichloromethane ch 2 cl 2 dcm at 5 u00b0 c.