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Horner-Wadsworth-Emmons试剂 [烯化反应]

 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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产品编码 D3328
CAS RN 63909-50-2
纯度/分析方法 >98.0%(GC)

产品编码 T2135
CAS RN 3699-66-9
纯度/分析方法 >98.0%(GC)

产品编码 T2294
CAS RN 995-32-4
纯度/分析方法 >98.0%(GC)

产品编码 T1582
CAS RN 4546-04-7
纯度/分析方法 >95.0%(HPLC)

产品编码 D3873
CAS RN 32806-04-5
纯度/分析方法 >98.0%(GC)

产品编码 D3813
CAS RN 3084-40-0
纯度/分析方法 >97.0%(GC)

产品编码 D3824
CAS RN 58263-67-5
纯度/分析方法 >98.0%(T)(HPLC)

产品编码 D3708
CAS RN 124931-12-0
纯度/分析方法 >97.0%(GC)

产品编码 D3688
CAS RN 38186-51-5
纯度/分析方法 >98.0%(GC)

产品编码 D3327
CAS RN 62778-16-9
纯度/分析方法 >98.0%(GC)

产品编码 D4434
CAS RN 1186-10-3
纯度/分析方法 >95.0%(GC)

产品编码 D5176
CAS RN 50889-46-8
纯度/分析方法 >98.0%(GC)

产品编码:   D3328 | 纯度/分析方法   >98.0%(GC)

产品编码:   T2135 | 纯度/分析方法   >98.0%(GC)

产品编码:   T2294 | 纯度/分析方法   >98.0%(GC)

产品编码:   T1582 | 纯度/分析方法   >95.0%(HPLC)

产品编码:   D3873 | 纯度/分析方法   >98.0%(GC)

产品编码:   D3813 | 纯度/分析方法   >97.0%(GC)

产品编码:   D3824 | 纯度/分析方法   >98.0%(T)(HPLC)

产品编码:   D3708 | 纯度/分析方法   >97.0%(GC)

产品编码:   D3688 | 纯度/分析方法   >98.0%(GC)

产品编码:   D3327 | 纯度/分析方法   >98.0%(GC)

产品编码:   D4434 | 纯度/分析方法   >95.0%(GC)

产品编码:   D5176 | 纯度/分析方法   >98.0%(GC)