“…5-Aryl-3,6-dihydro-2 H -1,4-oxazin-2-ones 230 were synthesized via reacting the potassium salts of α-amino acids 229 with α-bromoacetophenones ( Scheme 68 ) [ 441 , 442 , 443 , 444 , 445 , 446 , 447 , 448 , 449 , 450 , 451 , 452 , 453 , 454 , 455 , 456 , 457 , 458 , 459 , 460 , 461 , 462 , 463 ].…”