Isomerization of Alkynylformolhydrazone Catalyzed by Iridium Complex

Chem. J. Chinese Universities ›› 1995, Vol. 16 ›› Issue (8): 1251.

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Isomerization of Alkynylformolhydrazone Catalyzed by Iridium Complex

MA Chun-Lin¹, MA Yong-Xiang², LU Xi-Yan³

1. Department of Chemistry, Liaocheng Teachers'College, Liaocheng, 252059;
2. Department of Chemistry, Lanzhou University;
3. Shanghai Institute of Organic Chemistry, Academia Sinica

Received:1994-10-18 Revised:1995-02-06 Online:1995-08-24 Published:1995-08-24

Abstract

Abstract: The isomerization of alkynylformolhydrazone 1_a-ecatalyzed by IrH₅(i-Pr₃P)₂complex was studied. The isomerization of substrate 1_a,bgives 2E,4E-dienhydrazone 2_a,b;but under the same reactive condition,the substrate 1(_c-e) is isomerizated to 1Z,3Z-dienazo-compound 3_c-e.The 2_a,bcan be hydrosized to produce 2E,4E-dienaldehyde.So this is a high stereoselective synthetic approach of 2E,4E-dienaldehyde and 1Z,3Z-dienazo-compound. All the compounds were characterized by means of elementary analysis,IR,¹HNMR and MS spectra.

Key words: Alkynylformolhydrazone, Iridium complex, Isomerization, 2E,4E-dienaldehyde, 1Z,3Z-dienazo-compound

TrendMD:

MA Chun-Lin, MA Yong-Xiang, LU Xi-Yan. Isomerization of Alkynylformolhydrazone Catalyzed by Iridium Complex[J]. Chem. J. Chinese Universities, 1995, 16(8): 1251.

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Isomerization of Alkynylformolhydrazone Catalyzed by Iridium Complex

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