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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 D2547
CAS RN 16139-79-0
纯度/分析方法 >96.0%(GC)

产品编码 F0340
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纯度/分析方法 >95.0%(GC)

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纯度/分析方法 >97.0%(GC)

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纯度/分析方法 >98.0%(GC)

产品编码 B1781
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纯度/分析方法 >95.0%(GC)

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纯度/分析方法 >98.0%(GC)

产品编码 O0208
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纯度/分析方法 >95.0%(GC)

产品编码 C2440
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纯度/分析方法 >98.0%(HPLC)(N)

产品编码 M1319
CAS RN 1660-95-3
纯度/分析方法 >97.0%(GC)

产品编码 B5094
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纯度/分析方法 >95.0%(GC)

产品编码 B1714
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纯度/分析方法 >95.0%(GC)

产品编码 H0779
CAS RN 54731-72-5
纯度/分析方法 >92.0%(GC)

产品编码:   D2547 | 纯度/分析方法   >96.0%(GC)

产品编码:   F0340 | 纯度/分析方法   >95.0%(GC)

产品编码:   B2815 | 纯度/分析方法   >97.0%(GC)

产品编码:   B1923 | 纯度/分析方法   >98.0%(GC)

产品编码:   B1781 | 纯度/分析方法   >95.0%(GC)

产品编码:   B1795 | 纯度/分析方法   >98.0%(GC)

产品编码:   O0208 | 纯度/分析方法   >95.0%(GC)

产品编码:   C2440 | 纯度/分析方法   >98.0%(HPLC)(N)

产品编码:   M1319 | 纯度/分析方法   >97.0%(GC)

产品编码:   B5094 | 纯度/分析方法   >95.0%(GC)

产品编码:   H0779 | 纯度/分析方法   >92.0%(GC)