Alan R. Katritzky's Advances in Heterocyclic Chemistry, Vol. 39 PDF

By Alan R. Katritzky

ISBN-10: 0120206390

ISBN-13: 9780120206391

Meant for natural chemists, this quantity follows the layout of past volumes and offers up to date details on chosen parts of heterocyclic chemistry.

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Additional resources for Advances in Heterocyclic Chemistry, Vol. 39

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A. Sviridova, N. Y. Lebedenko, and A. N. Kost, Khim. Geterotsikl. Soedin. 4, 541 (1973). E. F. Godefroi, J. Org. Chem. 33, 860 (1968). REDUCTION OF NITROGEN HETEROCYCLES Sec. @ (26’) Treatment of the long-chain imidazolium salts 263 with potassium, sodium, and tetra-n-butylammonium borohydrides affords the acyclic diamines 264 and 265. 136Sodium cyanoborohydride failed to reduce the same salt under a variety of conditions. 136Sodium borohydride is a less effective reducing agent in this reaction, achieving the same conversion over a longer period of time.

Sykes, J. C. Chem. , 370 (1965). G . M. Clarke and P. Sykes, J. C. 141 1 (1967). Sec. 124 \s’ c, H*O S ‘’ RWC 0 $a, b i N. D. Bachi, J. C. S. Perkin I , 310 (1972). 126 12’ D. S u c k J. Prakt. Chem. 314,961 (1972). -L. -C. Roze, and G . Duguay, J. Chem. , 72 (1982). KEAY [Sec. A in such systems. Iz7This the imine bond in 2-phenyl-6H-l,3-thiazines results partially from the bond polarization effects of the phenyl group and partially from protonation. More powerful reducing agents affordring cleavage.

Perkin I, 1622 (1981). 14* J. A. Marshall and W. S. Johnson, J. Org. Chem. 28,421 (1963). 149 C. Kashima, A. Katoh, N. Yoshiwara, and Y. Omote,J. Chem. 18,1595 (198 1). 145 Sec. F] 49 REDUCTION OF NITROGEN HETEROCYCLES tXX R I LiAlH, TH F b R H M e NHR' R' (24 (288) X = O , S ; R'=Me,Aryl; RZ= H , M e , Pr,Ph; R3=H,Me,Ph recovered. Earlier, it had been found that ethyl 4-hydroxyiminomethyl-2methylthiopyrimidine-5-carboxylate(290a), and subsequently other pyrimidines, underwent preferential ring reduction.

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Advances in Heterocyclic Chemistry, Vol. 39 by Alan R. Katritzky

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