A method for preparing a compound of formula k
or a salt or solvate thereof,
wherein R
1
is as defined herein,
the method comprising treating a compound of formula j
or a salt or solvate thereof,
with ammonia, to form the compound of formula k.
一种制备式子k的化合物或其盐或溶剂的方法,其中R1的定义如此,该方法包括用
氨处理式子j的化合物或其盐或溶剂,以形成式子k的化合物。