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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 B1795
CAS RN 1080-32-6
Purity / Analysis Method: >98.0%(GC)

Product Number B1923
CAS RN 17919-34-5
Purity / Analysis Method: >98.0%(GC)

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

Product Number B4011
CAS RN 89524-98-1
Purity / Analysis Method: >98.0%(HPLC)(N)

Product Number C1430
CAS RN 2537-48-6
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 D1524
CAS RN 3699-67-0
Purity / Analysis Method: >98.0%(GC)

Product Number D2967
CAS RN 976-56-7
Purity / Analysis Method: >98.0%(HPLC)

Product Number D3323
CAS RN 1552-41-6
Purity / Analysis Method: >98.0%(GC)

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

Product Number D3326
CAS RN 60815-18-1
Purity / Analysis Method: >98.0%(GC)

Product Number:   B1795 | Purity / Analysis Method:   >98.0%(GC)

Product Number:   B1923 | Purity / Analysis Method:   >98.0%(GC)

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

Product Number:   B4011 | Purity / Analysis Method:   >98.0%(HPLC)(N)

Product Number:   C1430 | 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:   D1524 | Purity / Analysis Method:   >98.0%(GC)

Product Number:   D2967 | Purity / Analysis Method:   >98.0%(HPLC)

Product Number:   D3323 | Purity / Analysis Method:   >98.0%(GC)

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

Product Number:   D3326 | Purity / Analysis Method:   >98.0%(GC)

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