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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 B1923
CAS RN 17919-34-5
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 M1319
CAS RN 1660-95-3
Purity / Analysis Method: >97.0%(GC)

Product Number B2815
CAS RN 57443-18-2
Purity / Analysis Method: >97.0%(GC)

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

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

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

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

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

Product Number B1714
CAS RN 88738-78-7
Purity / Analysis Method: >95.0%(GC)

Product Number B1781
CAS RN 5324-30-1
Purity / Analysis Method: >95.0%(GC)

Product Number:   B1923 | 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:   M1319 | Purity / Analysis Method:   >97.0%(GC)

Product Number:   B2815 | Purity / Analysis Method:   >97.0%(GC)

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

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

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

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

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

Product Number:   B1714 | Purity / Analysis Method:   >95.0%(GC)

Product Number:   B1781 | Purity / Analysis Method:   >95.0%(GC)