Synthesis of 2′,3′-Didehydro-2′,3′-dideoxyformycin A, 2prime;,3′-Dideoxyformycin A and 2′,3′-Dideoxytubercidin
作者:Pawel Serafinowski
DOI:10.1055/s-1990-26890
日期:——
2′,3′-Didehydro-2′,3′-dideoxyformycin A (7) was prepared by reaction of the 7-amino-3-[5-O-(2-acetoxyisobutyryl)-3-bromo -3-deoxy-2-O-phenoxy(thiocarbonyl)-β-D-xylofuranosyl]-1 H-pyrazolo [4,3-d]-pyrimidine (5) or 7-amino-3-[5-O-(2-acetoxyisobutyryl)-2-bromo-2-deoxy -3-O-phenoxy(thiocarbonyl)-β-D-arabinofuranosyl]-1H-pyrazolo[4, 3-d]pyrimidine (9) with tributyltin hydride and subsequent deprotection of the resulting 5′-O-(2-acetoxyisobutyryl)-2′, 3′-didehydro-2′,3′-dideoxyformycin A (6). 2′,3′-Dideoxyformycin A (13) and 2′,3′-dideoxytubercidin (16) were synthesized via deoxygenation of their respective 3′-deoxy counterparts 10 and 2, respectively.
2',3'-二脱氢-2',3'-二脱氧福霉素 A (7) 是通过 7-氨基-3-[5-O-(2-乙酰氧基异丁酰)-3-溴-3-脱氧- 2-O-苯氧基(硫代羰基)-β-D-呋喃木糖基]-1 H-吡唑并[4,3-d]-嘧啶(5)或7-氨基-3-[5-O-(2-乙酰氧基异丁酰)- 2-溴-2-脱氧-3-O-苯氧基(硫代羰基)-β-D-阿拉伯呋喃糖基]-1H-吡唑并[4, 3-d]嘧啶 (9) 与氢化三丁基锡,随后将所得 5′-脱保护O-(2-乙酰氧基异丁酰)-2',3'-二脱氢-2',3'-二脱氧福霉素 A (6)。 2',3'-双脱氧福霉素 A (13) 和 2',3'-双脱氧结核菌素 (16) 分别通过其各自的 3'-脱氧对应物 10 和 2 脱氧合成。