Processes for dialkylating indolinones, specifically indolin-2-ones are provided. The processes for dialkylating an indolin-2-one include performing the dialkylation in the presence of at least 2 equivalents of a first base, a second base containing at least 1 equivalent of lithium diisopropylamide, and an alkylating agent.
Processes for preparing a compound of the structure are provided, wherein R
1
, R
3
, R
4
, R
6
, R
7
, R
9
, and R
10
are as defined herein.
In one embodiment, a process for preparing 5-(4′-fluoro-2′-oxospiro[cyclopropane-1,3′-indoline]-5′-yl)-1-methyl-1H-pyrrole-2-carbonitrile is provided.
提供了一种用于二烷基化
吲哚酮,特别是
吲哚-2-酮的工艺。二烷基化
吲哚-2-酮的工艺包括在至少2当量的第一碱存在下进行二烷基化,在含有至少1当量的异丙基二
乙基锂的第二碱存在下进行,以及在有机烷基化试剂存在下进行。提供了一种制备该结构化合物的工艺,其中R1、R3、R4、R6、R7、R9和R10如本文所定义。在一种实施例中,提供了一种制备5-(4′-
氟-2′-氧代螺[cyclopropane-1,3′-indoline]-5′-基)-1-甲基-1H-
吡咯-2-羧腈的工艺。