The present invention provides processes for the preparation of compounds of formula (I) including processes comprising a. reacting a compound of formula (II) with a nucleophile in the presence of water to give a compound comprising a thietane moiety in which the carbon atom at the 3 position of the thietane moiety is bonded to a nitrogen atom; wherein the nucleophile is selected the group consisting of: N3−, a sulfonamide having two hydrogen atoms bound to the nitrogen atom, a diimide having a hydrogen atom bound to the nitrogen atom or an anion thereof, NH2OH and NH3; and b. when the nucleophile used in step a. is N3− or NH2OH, reacting the compound produced in step a. with a suitable reducing agent to give a compound of formula (I); or when the nucleophile used in step a. is a sulfonamide, reacting the compound produced in step a. with a reagent suitable for cleaving the S—N bond of the sulfonamide group to give a compound of formula (I); or when the nucleophile used in step a. is a diimide, reacting the compound produced in step a. with a reagent suitable for cleaving the C—N bond of the amide group to give a compound of formula (I). The invention also relates to intermediates useful for the preparation of compounds of formula (I).
本发明提供了制备式(I)化合物的方法,包括以下步骤:a. 在
水的存在下,将式(II)化合物与核苷酸发生反应,得到包含
噻吩环的化合物,其中
噻吩环上3位碳原子与氮原子相结合;其中核苷酸被选为以下组:N3−、含有两个氢原子与氮原子结合的磺酰胺、具有与氮原子结合的氢原子或其阴离子的二亚甲基化合物、NH2OH和NH3;b. 当步骤a中使用的核苷酸为N3−或NH2OH时,用适当的还原剂将步骤a中产生的化合物与还原剂反应,得到式(I)的化合物;或者当步骤a中使用的核苷酸为磺酰胺时,用适合裂解磺酰胺基团的试剂将步骤a中产生的化合物与试剂反应,得到式(I)的化合物;或者当步骤a中使用的核苷酸为二亚甲基化合物时,用适合裂解酰胺基团的试剂将步骤a中产生的化合物与试剂反应,得到式(I)的化合物。本发明还涉及用于制备式(I)化合物的中间体。