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Horner-Wadsworth-Emmons Reagents [Olefination]

 Horner-Emmons reagents are efficient olefinating reagents for the preparation of α-β-unsaturated esters. Generally, their reaction with aldehydes affords the E-isomer of the related olefins preferentially. So, to obtain the E-isomer selectively, it is required to investigate the reaction conditions and other effective olefinating reagants.
 Ando had studied the Z-preferential Horner-Emmons reaction on the basis of detailed analysis of its reaction mechanism, and resultantly it was found that the Z-isomer of α-β-unsaturated esters was given with high stereoselectively by use of ethyl (diaryl)phosphonoacetates as olefinating reagents.1) In this synthetic method, quaternary ammonium hydroxides stable to water are available as a base, and it doesn’t require any special experimental-equipment/-technique. In addition, this method gives Z-α-β-unsaturated esters with extremely high stereoelectivity, so ethyl (diaryl)phosphonoacetates are the practical Horner-Emmons reagents.
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Product Number F0340
CAS RN 2356-16-3
Purity / Analysis Method: >95.0%(GC)

Product Number P1258
CAS RN 51868-96-3
Purity / Analysis Method: >95.0%(GC)

Product Number C1595
CAS RN 78055-64-8
Purity / Analysis Method: >98.0%(GC)

Product Number C1430
CAS RN 2537-48-6
Purity / Analysis Method: >98.0%(GC)

Product Number H0779
CAS RN 54731-72-5
Purity / Analysis Method: >92.0%(GC)

Product Number P1193
CAS RN 33512-26-4
Purity / Analysis Method: >98.0%(GC)

Product Number D3708
CAS RN 124931-12-0
Purity / Analysis Method: >97.0%(GC)

Product Number D4397
CAS RN 54094-19-8
Purity / Analysis Method: >98.0%(GC)

Product Number D3174
CAS RN 1067-71-6
Purity / Analysis Method: >95.0%(GC)

Product Number D3324
CAS RN 63909-58-0
Purity / Analysis Method: >98.0%(GC)

Product Number D5176
CAS RN 50889-46-8
Purity / Analysis Method: >98.0%(GC)

Product Number T2294
CAS RN 995-32-4
Purity / Analysis Method: >98.0%(GC)

Product Number:   F0340 | Purity / Analysis Method:   >95.0%(GC)

Product Number:   P1258 | Purity / Analysis Method:   >95.0%(GC)

Product Number:   C1595 | Purity / Analysis Method:   >98.0%(GC)

Product Number:   C1430 | Purity / Analysis Method:   >98.0%(GC)

Product Number:   H0779 | Purity / Analysis Method:   >92.0%(GC)

Product Number:   P1193 | Purity / Analysis Method:   >98.0%(GC)

Product Number:   D3708 | Purity / Analysis Method:   >97.0%(GC)

Product Number:   D4397 | Purity / Analysis Method:   >98.0%(GC)

Product Number:   D3174 | Purity / Analysis Method:   >95.0%(GC)

Product Number:   D3324 | Purity / Analysis Method:   >98.0%(GC)

Product Number:   D5176 | Purity / Analysis Method:   >98.0%(GC)

Product Number:   T2294 | Purity / Analysis Method:   >98.0%(GC)