The wittig reaction with 2,2-dimethyl-1,3-indandione

The Wittig Reaction

The Wittig Reaction

This so-called Wittig reaction has a number of advantages over other olefination methods; in particular, it occurs with total positional selectivity (that is, an alkene always directly replaces a carbonyl group). By comparison, a number of other carbonyl olefination reactions often occur with double-bond rearrangement. In addition, the factors that influence Eand Z-stereoselectivity are well un...

A Study on the Mannich Reaction with 1,3-Indandione

A ttem pted M annich reaction with the title com pound 1 using m orpholine and formalin led to 2 or 4 according to the reaction conditions. W hereas, on using prim ary amines the diindeno [l,2-b:2 ',l'-e]pyridine (9 -1 1 ) were obtained, in addition to 2-methylene1,3-indandione (6 ), in case o f 10 and 11. However, the M annich bases 1 3 -1 5 were form ed on treating 2-benzylidene-1,3-indandion...

Using the Wittig reaction to produce alkenylcarbaboranes.

This communication reports the first use of the Wittig reaction to produce alkenylcarbaboranes.

Mechanism of the Phospha-Wittig–Horner Reaction**

General. All reactions were performed under argon using Schlenk techniques. Diethyl ether and THF were freshly distilled from sodium/benzophenone prior to use. 1 H, 13 C and 31 P spectra were recorded on a 400 MHz and 300 MHz spectrometers. Chemical shifts (ppm) were reported and referenced to the internal signal of residual protic solvent. High resolution mass spectral analyses (HRMS) were per...