Synthesis of benzyl and methyl 3-benzamido-2,3,6-trideoxy-2-fluoro-β-l-galactopyranoside: Protected C-2 fluoro analogues of daunosamine
作者:Lucia Helena Brito Baptistella、Anita Jocelyne Marsaioli、Jose Dias de Souza Filho、Geovane Geraldo de Oliveira、Alaide Braga de Oliveira、Aimee Dessinges、Sergio Castillon、Alain Olesker、Ton That Thang、Gabor Lukacs
DOI:10.1016/0008-6215(85)85048-5
日期:1985.7
Abstract The reaction of benzyl 2-benzamido-4,6- O -benzylidene-2-deoxy-3- O -tosyl-α- d -glucopyranoside or benzyl 4,6- O -benzylidene-2,3-benzoylepimino-2,3-dideoxy-α- d -allopyranoside with anhydrous tetrabutylammonium fluoride in hexamethylphosphoric triamide gave ∼40% of benzyl 3-benzamido-4,6- O -benzylidene-2,3-dideoxy-2-fluoro-α- d -altropyranoside ( 6a ). Transformation of 6a into benzyl 3-benzamido-2
摘要苄基2-苯甲酰胺基-4,6-O-亚苄基-2-脱氧-3-O-甲苯磺酰基-α-d-吡喃葡萄糖苷或苄基4,6-O-亚苄基-2,3-苯甲酰吡喃氨基-2, 3-dideoxy-α-d-allopyranoside与无水四丁基氟化铵在六甲基磷酸三酰胺中产生约40%的3-3-苯甲酰氨基-4,6-O-亚苄基-2,3-dideoxy-2-fluoro-α-d-altropyranoside( 6a)。通过公认的方法将6a转化为苄基3-苯甲酰胺基-2,3,6-三苯氧基-2-氟-α-d-阿拉伯糖-hex-5-烯吡喃糖苷(13a)。13a中双键的加氢使标题化合物具有良好的收率。还由九个步骤由2-氨基-2-脱氧-d-葡萄糖制备了3-苯甲酰胺基-2,3,6-三苯氧基-2-氟-β-1-吡喃半乳糖苷。