Alpha-substituted benzyl heterocyclic derivatives, intermediates for producing the same and pesticides containing the same as active ingredient

A compound of the formula (I):

• ##STR22## wherein R.sup.1 is an optionally substituted oxazolyl or isoxazolyl;
• R.sup.2 is optionally substituted aryl group or an optionally substituted heterocyclic group which is benzoxazolyl, benzothiazolyl, benzoimidazolyl, isoxazlyl, isothazoly, thiadiazoyl, pyridazinyl, pyrrolyl, pyrazolyl, furyl, thienyl, imidazolyl, oxazolyl, thiazolyl, oxadiazolyl, triazolyl, indolyl, benzisothiazoly, benzisoxazolyl, pyrrolidino, quinazolinyl;
• R.sup.3 is hydrogen, alkyl, alkenyl, or alkynyl;
• R.sup.4 is hydrogen, alkyl, alkoxy, halogen, nitro, cyano or halogenated alkyl;
• M is (1) oxygen, (2) S(O).sub.i wherein i is 0, 1, or 2, (3) NR.sup.5 wherein R.sup.5 is hydrogen, alkyl or acyl, (4) --Q--N.dbd.C(R.sup.6)-- wherein Q is oxygen or NR.sup.7 wherein R.sup.7 is hydrogen alkyl, or acyl;
• R.sup.6 is hydrogen, alkyl, acyl, alkylthio, alkylsulfinyl, alkylsulfonyl, halogenated alkyl, cyano, alkoxycarbonyl, alkoxyalkyl, optionally substituted amino, or cycloalkyl, or R.sup.2 and R.sup.6 taken together form cyclopentane, cyclohexane, indan, 1,2,3,4-tetrahydronaphthalene, 5,6,7,8-tetrahydroguinoline or 4,5,6,7-tetrahydrobenzo(b)furan, (5) --B--C(R.sup.8).dbd.N-- wherein B is oxygen or sulfur and R.sup.8 is hydrogen, alkyl, acyl, alkylthio, alkylsulfinyl, alkylsulfonyl, halogenated alkyl, cyano, alkoxycarbonyl, alkoxyalkyl, optionally substituted amino, or cycloalkyl, (6) --CH.dbd.N--N.dbd.C(R.sup.9)-- wherein R.sup.9 is hydrogen, alkyl, cyano, cycloalkyl, or halogenated alkyl, or (7) --CH.dbd.N--A--(CR.sup.10 R.sup.11)m-- wherein R.sup.10 and R.sup.11 are independently hydrogen, alkyl, cyano, or halogenated alkyl, A is oxygen or NR.sup.12 wherein R.sup.12 is hydrogen alkyl, or acyl, and m is 0 or 1;
• and n is 0, 1, or 2.