作者:Qizheng Yao、Wolfgang Pfleiderer
DOI:10.1002/hlca.200390025
日期:2003.1
compounds can be alkylated under Mitsunobu conditions to form from N2-acylpterins (see 2 and 3) and their derivatives (see 5, 6, 8, 9, 11, 13, 15, and 17) selectively the O4-alkyl derivatives 22–31, whereas the electron-donating [(dimethylamino)methyleneamino function in 46–51 gives, in a selective reaction, the N(3)-substitution (52–61). N2,N2-Dimethylpterins and 18 and 19 and N2-methylpterins 20 and 21
蝶呤的低溶解度可通过N 2-酰化或形成N 2 -[((二甲基氨基)亚甲基]衍生物而大大改善。这两种类型的化合物可以下被烷基化的Mitsunobu条件从到形式Ñ 2 -acylpterins(参照2和3)和它们的衍生物(参见图5,6,8,9,11,13,15,和17)选择性地将Ò 4 -烷基衍生物22 – 31,而给电子体[[(二甲基氨基)亚甲基氨基]在46 – 51在选择性反应中给出N(3)取代(52 – 61)。Ñ 2,Ñ 2个-Dimethylpterins和18个19和Ñ 2 -methylpterins 20和21直接烷基化还向Ò 4位上(32 - 35,38和39)。脱酰可以在非常温和的条件下通过溶剂解用MeOH(实现22 40,26 41),和所述的位移Ò 4- [2-(4-硝基苯基)乙基]基团在室温下,以相应的蝶啶-2,4-二胺氨前进42 - 45。N 2 -[((二甲基氨基)亚甲基]基团的裂解可很好地与氨(62