The present application discloses a method comprising: (A)
(i) admixing a methylnicotinate of Formula (I):
wherein R3 is Cl, Br, or I, and R4 is alkyl;
with 1,3,5-triazine, and a base, under conditions sufficient to form a naphthyridinone of Formula (II):
(ii) admixing the naphthyridinone of Formula (II) with methoxyethanol, a base, and a copper (I) catalyst, under conditions sufficient to form 3-(2-methoxyethoxy)-1,6-naphthyridin-5(6H)-one ("NAPH"):
or (B):
(i) admixing protected 2-alkoxypyridin-4-ylamine with a lithium reagent, under conditions sufficient to form the protected N-(3-formyl-4-amino-2-alkoxy)pyridine:
wherein PG is a protecting group
wherein R 8 is an alkyl group;
(ii) admixing the protected N-(3-formyl-4-amino-2-alkoxy)pyridine with 1-hydroxy-2-(2-methoxyethoxy)ethane-1 -sulfonate:
and base, under conditions sufficient to form a naphthyridine of Formula (III):
; and
(iii) acidifying the naphthyridine of Formula (III), under conditions sufficient to form 3-(2-methoxyethoxy)-1,6-naphthyridin-5(6H)-one ("NAPH"):
本申请公开了一种方法,包括: (A)
(i) 加入式(I)的甲基
烟酸:
其中 R3 是 Cl、Br 或 I,R4 是烷基;
与
1,3,5-三嗪和碱在足以形成式(II)的
萘啶酮的条件下混合:
(ii) 在足以形成 3-(2-甲氧基乙氧基)-1,6-
萘啶-5(6H)-酮("NAPH")的条件下,将式 (II)的
萘啶酮与甲氧基
乙醇、碱和
铜(I)催化剂混合:
或 (B):
(i) 在足以形成受保护的 N-(3-甲酰基-4-
氨基-2-烷氧基)
吡啶的条件下,将受保护的 2-烷氧基
吡啶-4-胺与
锂试剂混合:
其中
PG 为保护基团
其中 R 8 为烷基;
(ii) 将受保护的 N-(3-甲酰基-4-
氨基-2-烷氧基)
吡啶与 1-羟基-2-(2-甲氧基乙氧基)
乙烷-1-
磺酸盐混合:
和碱,在足以形成式(III)的
萘啶的条件下:
;以及
(iii) 在足以形成 3-(2-甲氧基乙氧基)-1,6-
萘啶-5(6H)-酮 ("NAPH")的条件下,酸化式 (III) 的
萘啶: