The present invention provides a method for producing an indazol-3-ylmethyl phosphonium salt represented by Formula (IV):
[wherein X represents halogen, OSO
2
R
a
(wherein R
a
represents substituted or unsubstituted lower alkyl, substituted or unsubstituted aryl or the like), or OC(═O)R
b
(wherein R
b
has the same meaning as the above R
a
), or the like, and R
1
, R
2
and R
3
may be the same or different and each represents substituted or unsubstituted aryl or the like] or a salt thereof, which comprises reacting a compound represented by Formula (I):
a compound represented by Formula (II):
H—X (II)
(wherein X has the same meaning as defined above), and a compound represented by Formula (III):
(wherein R
1
, R
2
and R
3
have the same meanings as defined above, respectively), and the like.
本发明提供了一种制备由公式(IV)表示的
吲哚-3-基
甲基膦酸盐的方法:[其中X代表卤素,OSO2Ra(其中Ra代表取代或未取代的低级烷基,取代或未取代的芳基或类似物),或OC(═O)Rb(其中Rb与上述Ra具有相同的含义),或类似物,而R1、R2和R3可以相同也可以不同,每个都代表取代或未取代的芳基或类似物]或其盐,其包括将由公式(I)表示的化合物:由公式(II)表示的化合物:H—X(其中X具有上述定义的相同含义),以及由公式(III)表示的化合物:[其中R1、R2和R3分别具有上述相同的含义]等反应。