Lithiation followed by reaction with a carbonyl compound gives a ß-hydroxyphosphonamide, readily dehydrated to an alkene: J. Am. Chem. Soc., 90, 6816 (1968):
This procedure is complementary to the Horner-Wadsworth-Emmons method (see Appendix 1) since it allows stereochemical control and is especially useful for the synthesis of highly-substituted alkenes. Additional groups can be introduced by alkylation prior to condensation.
安全信息
WGK Germany
3
Packing Group
III
UN Number
UN3278
Risk Statements
R20/21/22 Harmful by inhalation, in contact with skin and if swallowed 吸入、皮肤接触和不慎吞咽有害
Safety Statements
S36/37 Wear suitable protective clothing and gloves 穿戴适当的防护服和手套;