Compounds of formula I ##STR1## or their hydroxy-protected derivatives, and compounds of formula I' ##STR2## wherein T is an acyl radical of formula Z ##STR3## wherein R.sup.z is unsubstituted or substituted hydrocarbyl wherein at least one carbon atom has been replaced by a hetero atom with the proviso that a hetero atom is not bonded directly to the carbonyl to which the radical R.sup.z is bonded, alkyl having two or more carbon atoms, lower alkenyl, lower alkynyl, aryl or unsubstituted or substituted amino, and wherein the radicals R.sub.1, B.sub.1, R.sub.2, R.sub.3, A.sub.1, A.sub.2 and NR.sub.4 R.sub.5 are as defined in the description, and precursors thereof, are described. The compounds have pharmaceutical activity, for example in the treatment of retroviral diseases, such as AIDS.
式I的化合物##STR1##或其羟基保护衍
生物,以及式I'的化合物##STR2##其中T是式Z的酰基基团##STR3##其中R.sup.z是未取代或取代的烃基,其中至少有一个碳原子被杂原子取代,但杂原子不直接连接到基团R.sup.z所连接的羰基上,烷基具有两个或更多碳原子,低烯烃基,低炔基,芳基或未取代或取代的
氨基,其中基团R.sub.1,B.sub.1,R.sub.2,R.sub.3,A.sub.1,A.sub.2和NR.sub.4R.sub.5的定义如描述中所述,并描述了其前体。这些化合物具有药物活性,例如在治疗逆转录病毒性疾病(如艾滋病)方面。