Liu, Wenjuan published the artcileCopper-catalyzed highly selective synthesis of 2-benzyl- and 2-benzylidene-substituted benzo[b]thiazinones from 2-iodophenylcinnamamides and potassium sulfide, Synthetic Route of 1772-76-5, the publication is Organic & Biomolecular Chemistry (2017), 15(46), 9804-9808, database is CAplus and MEDLINE.
An efficient and practical procedure for the synthesis of 2-benzyl benzo[b]thiazinones and 2-benzylidene benzo[b]thiazinones I [R1 = Ph, 2-MeC6H4, 3,4-(MeO)2C6H3, etc.; R2 = H, 7-Me, 6-F, etc.; R3 = H, Me, Ph, PhCH2] from easily available 2-iodophenylcinnamamides II and potassium sulfide has been developed. In the presence of DBU, the reaction proceeds via electrophilic addition, followed by dehydrogenation and reduction to give 2-benzyl benzo[b]thiazinones. Furthermore, 2-benzylidenebenzo[b]thiazinones were obtained in moderate to good yields without the addition of DBU.
Organic & Biomolecular Chemistry published new progress about 1772-76-5. 1772-76-5 belongs to catalysis-chemistry, auxiliary class Benzenes, name is (E)-3-(3-Nitrophenyl)acrylic acid, and the molecular formula is C9H7NO4, Synthetic Route of 1772-76-5.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia