Processes for preparing compounds of Formula (1) and Formula (2) are described, wherein X, Y, Z, R1-R7, L and n are defined herein. Intermediates useful in the preparation of the compounds of Formula (1) and Formula (2) are also described.本發明闡述用於製備式(1)及式(2)化合物之方法,其中X、Y、Z、R1-R7、L及n定義於本文中。本發明亦闡述可用於製備式(1)及式(2)化合物之中間體。