9 3, R= H 10, R= D decarboxylation of 8 yaelded the dibromo ketal 9 which WBS dehalogenated'O with Li-THF-t-BuOH and hydrolyzed with acid to yield 3." All the steps from 8 to 3 proceeded in over 90% yield. The procedure for obtaining 3 from 8 is particularly efficacious for preparing labeled 3 required in mechanistic studies. 12 Thus, reaction of 9 with Li-THF-t-BuOD led to the formation of homocubanone-dz (10; d2= 49%, dl= 3570, do ...
[Binmore, Gavin T.; Della, Ernest W.; Elsey, Gordon M.; Head, Nicholas J.; Walton, John C. Journal of the American Chemical Society, 1994 , vol. 116, # 7 p. 2759 - 2766]
[Binmore, Gavin T.; Della, Ernest W.; Elsey, Gordon M.; Head, Nicholas J.; Walton, John C. Journal of the American Chemical Society, 1994 , vol. 116, # 7 p. 2759 - 2766]