Patent Number: 6,166,208

Title: Preparation of fungicidal quinazolinones and useful intermediates

Abstract: This invention provides advantageous processes for preparing quinazolinones of Formula I ##STR1## wherein: R.sup.1 is C.sub.1 -C.sub.10 alkyl; C.sub.3 -C.sub.10 alkenyl; C.sub.3 -C.sub.10 cycloalkyl; C.sub.3 -C.sub.10 halocycloalkyl; C.sub.4 -C.sub.10 cycloalkylalkyl; C.sub.4 -C.sub.10 halocycloalkylalkyl; or C.sub.3 -C.sub.10 alkynyl; R.sup.2 is C.sub.1 -C.sub.10 alkyl; C.sub.3 -C.sub.10 alkenyl; C.sub.3 -C.sub.10 cycloalkyl; C.sub.3 -C.sub.10 halocycloalkyl; C.sub.4 -C.sub.10 cycloalkylalkyl; C.sub.4 -C.sub.10 halocycloalkylalkyl; C.sub.4 -C.sub.10 cycloalkyl; C.sub.4 -C.sub.10 halocycloalkyl; or C.sub.3 -C.sub.10 alkynyl; and R.sup.3 and R.sup.4 are each independently hydrogen or halogen; from compounds containing the moiety IIg ##STR2## This invention further provides certain compounds of Formula II, IIIa, or IVa ##STR3## where R.sup.7 is C.sub.2 -C.sub.6 alkyl.

Inventors: Bereznak; James Francis (Aston, PA), Marshall; Eric Allen (Elkton, MD), Sternberg; Charlene Gross (Wilmington, DE), Sternberg; Jeffrey Arthur (Wilmington, DE), Sun; King-Mo (Hockessin, DE)

Assignee: E. I. du Pont de Nemours and Company

International Classification: C07D 239/00 (20060101); C07D 239/95 (20060101); C07D 239/96 (); C07C 271/68 ()

Expiration Date: 12/26/2017