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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 D2873
CAS RN 1067-74-9
Purity / Analysis Method: >96.0%(GC)

Product Number M1208
CAS RN 28460-01-7
Purity / Analysis Method: >97.0%(GC)

Product Number E0483
CAS RN 78-38-6
Purity / Analysis Method: >95.0%(GC)
Chemical Substance Law (ENCS):   2-1961 | First-class designated chemicals (Precursor)

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

Product Number P1265
CAS RN 5927-18-4
Purity / Analysis Method: >96.0%(GC)

Product Number D3873
CAS RN 32806-04-5
Purity / Analysis Method: >98.0%(GC)

Product Number T3904
CAS RN 136455-49-7
Purity / Analysis Method: >95.0%(HPLC)

Product Number M0943
CAS RN 756-79-6
Purity / Analysis Method: >97.0%(GC)
Deleterious substance | Chemical Substance Law (ENCS):   2-1961 | First-class designated chemicals (Precursor)

Product Number E1160
CAS RN 311-46-6
Purity / Analysis Method: >97.0%(GC)

Product Number B5094
CAS RN 62327-21-3
Purity / Analysis Method: >95.0%(GC)

Product Number O0208
CAS RN 4202-14-6
Purity / Analysis Method: >95.0%(GC)

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

Product Number:   D2873 | Purity / Analysis Method:   >96.0%(GC)

Product Number:   M1208 | Purity / Analysis Method:   >97.0%(GC)

Product Number:   E0483 | Purity / Analysis Method:   >95.0%(GC)| Chemical Substance Law (ENCS):   2-1961 | First-class designated chemicals (Precursor)

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

Product Number:   P1265 | Purity / Analysis Method:   >96.0%(GC)

Product Number:   D3873 | Purity / Analysis Method:   >98.0%(GC)

Product Number:   M0943 | Purity / Analysis Method:   >97.0%(GC)| Deleterious substance | Chemical Substance Law (ENCS):   2-1961 | First-class designated chemicals (Precursor)

Product Number:   E1160 | Purity / Analysis Method:   >97.0%(GC)

Product Number:   B5094 | Purity / Analysis Method:   >95.0%(GC)

Product Number:   O0208 | Purity / Analysis Method:   >95.0%(GC)