To provide a method for producing a difluoro compound highly selectively in good yield without forming a hardly soluble by-product.
An ester compound represented by the formula (1) is reacted and fluorinated with an electrophilic fluorinating agent in the presence of a basic compound and in the absence of a metal compound reactant to produce a difluoro ester compound represented by the formula (2).
(R1 is a group selected from the group consisting of a C1-30 alkyl group which may have a substituent, a C3-30 cycloalkyl group which may have a substituent, a C4-30 cycloalkenyl group which may have a substituent (provided that the carbon atom adjacent to the carbon atom at the α-position of the carbonyl group forms no double bond), a C2-30 alkynyl group which may have a substituent, and a C8-30 cycloalkynyl group which may have a substituent, and R2 is a C1-30 hydrocarbon group which may have a substituent, or R1 and R2 are bonded to form an alkylene group which forms, together with -C-C(O)-O-, a lactone ring which has from 3 to 8 carbon atoms in the ring and which may have a substituent.).
提供一种高选择性、高产率地生产二
氟化合物而不产生难溶副产物的方法。
在有碱性化合物存在和没有
金属化合物反应物的情况下,将式(1)表示的酯化合物与亲电
氟化剂反应并
氟化,生成式(2)表示的二
氟化酯化合物。
(R1为选自以下组别的基团:C1-30烷基(可带有取代基)、C3-30环烷基(可带有取代基)、C4-30环烯基(可带有取代基)(条件是与羰基α位碳原子相邻的碳原子不形成双键)、C2-30炔基(可具有取代基)和C8-30环炔基(可具有取代基),R2为C1-30烃基(可具有取代基),或 R1和R2键合形成亚烷基,与-C-C(O)-O-一起形成内酯环(环上有3至8个碳原子,可具有取代基)。).