Herz Reaction R. Herz, DE 360690 (1914 to Cassella & Co.); US 1637023 (1928); US 1699432 (1929). Formation of o-aminothiophenols by heating aromatic

HERON Rearrangement (Heteroatom Rearrangements on ) J. M. Buccigross et al., Aust. J. Chem. 48, 353 (1995); J. M. Buccigross, S. A. Glover, J. Chem. Soc. Perkin Trans. II

Henry Reaction (Nitroaldol Reaction) L. Henry, Compt. Rend. 120, 1265 (1895); J. Kamlet, US 2151517 (1939). Base-catalyzed aldol-type condensation, q.v.

Henkel Reaction (Raecke Process, Henkel Process) B. Raecke, DE 936036 (1952) and DE 958920 (1952) to Henkel & Co. Industrial scale thermal rearrange

Hell-Volhard-Zelinsky Reaction C. Hell, Ber. 14, 891 (1881); J. Volhard, Ann. 242, 141 (1887); N. Zelinsky, Ber. 20, 2026 (1887). α-Halogenation o

Helferich Method B. Helferich, E. Schmitz-Hillebrecht, Ber. 66, 378 (1933). Glycosidation of an acetylated sugar by heating with a phenol in the presenc

Heck Reaction R. F. Heck, J. P. Nolley, Jr., J. Org. Chem. 37, 2320 (1972). Stereospecific palladium-catalyzed coupling of alkenes with organic halides

Hayashi Rearrangement M. Hayashi, J. Chem. Soc. 1927, 2516; 1930, 1513, 1520, 1524. Rearrangement of o-benzoylbenzoic acids in the presence of sulfuric

Haworth Synthesis R. D. Haworth, J. Chem. Soc. 1932, 1125, 2717, idem et al., ibid. 1784, 2248, 2720; 1934, 454. Preparation of phenanthrenes from naph

Haworth Methylation W. N. Haworth, J. Chem. Soc. 107, 13 (1915). Formation of methylated methyl glycosides from monosaccharides with dimethyl sulfate an

Sommelet-Hauser Rearrangement M. Sommelet, Compt. Rend. 205, 56 (1937). Rearrangement of benzyl quaternary ammonium salts to ortho substituted benzyldia

Harries Ozonide Reaction (Ozonolysis) C. Harries, Ann. 343, 311 (1905). Treatment of olefins with ozone as a method of cleaving olefinic linkages. On hy

Hantzsch Pyrrole Synthesis A. Hantzsch, Ber. 23, 1474 (1890). Formation of pyrrole derivatives from α-chloromethyl ketones, β-keto esters and

Hantzsch Synthesis ( Synthesis) A. Hantzsch, Ann. 215, 1, 72 (1882); Ber. 18, 1744 (1885); 19, 289 (1886). Synthesis of dihydropyridines by condensatio

Hammick Reaction P. Dyson, D. L. Hammick, J. Chem. Soc. 1937, 1724. Decarboxylation of α-picolinic or related acids in the presence of carbonyl co

Lieben Iodoform Reaction (Haloform Reaction) A. Lieben, Ann. (Suppl.) 7, 218 (1870). Cleavage of methyl ketones with halogens (mostly iodine) and base t

Koch-Haaf Carboxylations H. Koch, Brennstoff Chem. 36, 321 (1955); H. Koch, W. Haaf, Ann. 618, 251 (1958). Formation of tertiary carboxylic acids by tre

Vilsmeier-Haack Reaction A. Vilsmeier, A. Haack, Ber. 60, 119 (1927). Formylation of activated aromatic or heterocyclic compounds with disubstituted for

Gutknecht Pyrazine Synthesis H. Gutknecht, Ber. 12, 2290 (1879); 13, 1116 (1880). Cyclization of α-amino ketones, produced by reduction of isonitr

Guerbet Reaction M. Guerbet, Compt. Rend. 128, 511 (1899). Condensation of 1° or 2° alcohols at high temperature and pressure in the presence of