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

Product Number D1524
CAS RN 3699-67-0
Purity / Analysis Method: >98.0%(GC)

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

Product Number D3689
CAS RN 173443-43-1
Purity / Analysis Method: >98.0%(GC)

Product Number C2440
CAS RN 88568-95-0
Purity / Analysis Method: >98.0%(HPLC)(N)

Product Number T2135
CAS RN 3699-66-9
Purity / Analysis Method: >98.0%(GC)

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

Product Number D2547
CAS RN 16139-79-0
Purity / Analysis Method: >96.0%(GC)

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

Product Number F0340
CAS RN 2356-16-3
Purity / Analysis Method: >95.0%(GC)

Product Number B2801
CAS RN 60974-92-7
Purity / Analysis Method: >98.0%(GC)

Product Number M1319
CAS RN 1660-95-3
Purity / Analysis Method: >97.0%(GC)

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

Product Number:   D1524 | Purity / Analysis Method:   >98.0%(GC)

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

Product Number:   D3689 | Purity / Analysis Method:   >98.0%(GC)

Product Number:   C2440 | Purity / Analysis Method:   >98.0%(HPLC)(N)

Product Number:   T2135 | Purity / Analysis Method:   >98.0%(GC)

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

Product Number:   D2547 | Purity / Analysis Method:   >96.0%(GC)

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

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

Product Number:   B2801 | Purity / Analysis Method:   >98.0%(GC)

Product Number:   M1319 | Purity / Analysis Method:   >97.0%(GC)