Synthesis of 2- (and 6-) -dithian-2-yluracil nucleosides and their conversion into nucleoside derivatives
作者:A. Rosenthal、Robert H. Dodd
DOI:10.1016/s0008-6215(00)83658-7
日期:1980.1
)pyrimidinone ( 3 ), O 2 ,2′-anhydro-5,6-di-hydro-6-( S )-(1,3-dithian-2-yl)-5′- O -trityluridine ( 4 ), and 2-(1,4-dihydroxybutyl)-1,3-dithiane ( 5 ) in yields of 15, 30, and 10% respectively. The structure of 3 was proved by its hydrolysis in acid to give 2-(1,3-dithian-2-yl)-4-pyrimidinone ( 6 ) and arabinose, and by desulfurization with Raney nickel to yield the known 2-methyl-1-(5- O -trityl-β- D -
将2,2'-脱水-[1-(3-O-乙酰基-5-O-三苯甲基-β-D-阿拉伯呋喃糖基)尿嘧啶](1)添加至过量的2-litho-1,3-dithiane(2 )在-78°的环戊烷中得到2-(1,3-二噻吩-2-基)-1-(5-O-三苯甲基-β-D-阿拉伯呋喃糖基)-4(1 H)嘧啶酮(3),O 2 ,2'-脱水-5,6-二氢-6-(S)-(1,3-二硫-2-基)-5'-O-三苯甲基吡啶(4)和2-(1,4-二羟基丁基)-1,3-二噻吩(5)的产率分别为15%,30%和10%。3的结构通过其在酸中的水解得到2-(1,3-dithian-2-yl)-4-pyrimidinone(6)和阿拉伯糖,并通过阮内镍脱硫得到已知的2-甲基-甲基,从而证明了3的结构。 1-(5-O-三苯甲基-β-D-阿拉伯呋喃糖基)-4(1 H)-嘧啶酮(7)。不进行糖苷裂解的3的去三苯甲基化只能通过事先乙酰化为1-(2,