Tosoh Corporation

Yasuhito Takasu

Hiroyuki Watanabe

Kenji Tsuzuki

Teruhiko Ide

Takumi Tokunaga

Tetrahydroisoquinoline derivatives useful as fungicides are disclosed of formula [I]: ##STR1## wherein R.sup.1 represents C.sub.1 -C.sub.5 linear or branched alkyl, C.sub.2 -C.sub.5 linear or branched alkenyl, C.sub.2 -C.sub.5 linear or branched alkynyl; R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6, the same or different, represent hydrogen, C.sub.1 -C.sub.10 linear or branched alkyl, C.sub.3 -C.sub.10 linear or branched alkenyl, C.sub.2 -C.sub.10 linear or branched alkynyl, C.sub.1 -C.sub.10 linear or branched alkoxy, C.sub.2 -C.sub.10 linear or branched alkenyloxy, C.sub.2 -C.sub.10 linear or branched alkynyloxy, benzyloxy, hydroxy, haloalkyl, amino, mono- or di-substituted amino substituted with C.sub.1 -C.sub.4 linear or branched alkyl, phenyl or halogen; R.sup.2 and R.sup.3 may be bonded through a group of the formula --O--CH.sub.2).sub.m O-- wherein m represents integer of 1 or 2 or --CH.dbd.CH).sub.2 to form a ring; and R.sup.4 and R.sup.5 may be bonded through a group of the formula --O--CH.sub.2).sub.m O-- wherein m represents an integer of 1 or 2 or --CH.dbd.CH).sub.2 -- to form a ring.

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Shinnanyo, Japan

Yasuhito Takasu