Tapolcsanyi, Pal published the artcileSynthesis of some diazino-fused tricyclic systems via Suzuki cross-coupling and regioselective nitrene insertion reactions, Quality Control of 146140-95-6, the publication is Tetrahedron (2002), 58(51), 10137-10143, database is CAplus.
Suzuki coupling of 5-chloro-2-methyl-6-phenylpyridazin-3(2H)-one, 6-chloro-1,3-dimethyluracil and 2-chloropyrazine with protected aminoaryl boronic acids resulted in the corresponding (pivaloylamino)phenyl diazines which were transformed to diazino-fused indole and cinnoline derivatives Suzuki coupling of 5-amino-6-chloro-1,3-dimethyluracil with 2-formylphenyl boronic acid afforded a novel pyrimidoisoquinoline ring system in a one-pot reaction. For example, Suzuki coupling of 5-chloro-2-methyl-6-phenyl-3(2H)-pyridazinone with [2-[(2,2-dimethyl-1-oxopropyl)amino]phenyl]boronic acid gave 2-methyl-6-phenyl-5-[2-(pivaloyl)amino]-3(2H)-pyridazinone which was deprotected to give 5-(2-aminophenyl)-2-methyl-6-phenyl-3(2H)-Pyridazinone (I). Diazotization and sequential azidization of I gave 5-(2-azidophenyl)-2-methyl-6-phenyl-3(2H)-pyridazinone which was cyclized to give 3,5-dihydro-3-methyl-1-phenyl-4H-pyridazino[4,5-b]indol-4-one (II).
Tetrahedron published new progress about 146140-95-6. 146140-95-6 belongs to amides-buliding-blocks, auxiliary class Boronic acid and ester,Amine,Benzene,Amide,Boronic Acids,Boronic Acids,Boronic acid and ester,, name is (2-Pivalamidophenyl)boronic acid, and the molecular formula is C7H7ClN2S, Quality Control of 146140-95-6.
Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics