manufacture of fugizides chinazolinonen and useful intermediates

摘要

PCT No. PCT/US97/10254 Sec. 371 Date Dec. 9, 1998 Sec. 102(e) Date Dec. 9, 1998 PCT Filed Jun. 12, 1997 PCT Pub. No. WO97/48684 PCT Pub. Date Dec. 24, 1997This invention provides advantageous processes for preparing quinazolinones of Formula I wherein: R1 is C1-C10 alkyl; C3-C10 alkenyl; C3-C10 cycloalkyl; C3-C10 halocycloalkyl; C4-C10 cycloalkylalkyl; C4-C10 halocycloalkylalkyl; or C3-C10 alkynyl; R2 is C1-C10 alkyl; C3-C10 alkenyl; C3-C10 cycloalkyl; C3-C10 halocycloalkyl; C4-C10 cycloalkylalkyl; C4-C10 halocycloalkylalkyl; C4-C10 cycloalkyl; C4-C10 halocycloalkyl; or C3-C10 alkynyl; and R3 and R4 are each independently hydrogen or halogen; from compounds containing the moiety IIg This invention further provides certain compounds of Formula II, IIIa, or IVa where R7 is C2-C6 alkyl.