| 摘要 |
PROBLEM TO BE SOLVED: To obtain a new compound for useful as an intermediate for synthesizing methine compounds, especially asymmetric methine compounds. SOLUTION: A compound of formula I [Z1 is an atomic group capable of forming an oxazole ring, a thiazole ring or the like; R1 is an alkyl, an aryl or the like; R2, R3, R6 and R7 are each H or a substituent; R4 and R5 are each an alkyl or an aryl; (k1) is 0 or 1; (n1) is 0 to 4; M1 is a charge- neutralizing ion; (m1) is the number necessary for neutralizing the charge]. For example, a compound of formula II. The compound of formula I is obtained, for example, by reacting the corresponding unsaturated imine compound with a compound of the formula: R11SO2X (R11 is an alkyl or the like; X is a releasing group). A methine compound can efficiently be obtained by reacting the compound of formula I with a compound of formula III [Z3 is an atom group necessary for forming a five or six-membered nitrogen-containing heterogeneous ring; R13 is an alkyl or the like; R14 is an alkyl; R15 and R16 are each H or a substituent; M3 is a charge-neutralizing ion; (m3) is the number necessary for neutralizing the charge].
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