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

Guareschi-Thorpe Condensation I. Guareschi, Mem. Reale Accad. Sci. Torino II, 46, 7, 11, 25 (1896); H. Baron, et al., J. Chem. Soc. 85, 1726 (1904). Syn

Grundmann Aldehyde Synthesis C. Grundmann, Ann. 524, 31 (1936). Transformation of an acid into an aldehyde of the same chain length by conversion of the

Grob Fragmentation C. A. Grob, W. Baumann, Helv. Chim. Acta 38, 594 (1955). -carbon bond cleavage primarily via a concerted process involving a five ato

Grignard Reaction V. Grignard, Compt. Rend. 130, 1322 (1900). Traditionally, it is the addition of organomagnesium compounds (Grignard reagents) to carb

Grignard Degradation W. Steinkopf et al., Ann. 512, 136 (1934); 543, 128 (1940). Stepwise dehalogenation of a polyhalo compound through its Grignard rea

Griess Diazo Reaction; Witt and Knoevenagel Diazotization Methods P. Griess, Ann. 106, 123 (1858); 121, 257 (1862); E. Knoevenagel, Ber. 23, 2994 (1890); O. N. Witt, ibid.

Graebe-Ullmann Synthesis C. Graebe, F. Ullmann, Ann. 291, 16 (1896); F. Ullmann, ibid. 332, 82 (1904). Formation of carbazoles by the action of nitrous

Gould-Jacobs Reaction R. G. Gould, W. A. Jacobs, J. Am. Chem. Soc. 61, 2890 (1939). Synthesis of 4-hydroxys from anilines and diethyl ethoxymalonate via

Gomberg Free Radical Reaction M. Gomberg, J. Am. Chem. Soc. 22, 757 (1900). Formation of free radicals by abstraction of the halogen from triarylmethyl

Jourdan-Ullmann-berg Synthesis F. Jourdan, Ber. 18, 1444 (1885); F. Ullmann, ibid. 36, 2382 (1903); I. Goldberg, ibid. 39, 1691 (1906); 40, 4541 (1907).

Gattermann-Koch Reaction L. Gattermann, J. A. Koch, Ber. 30, 1622 (1897); L. Gattermann, Ann. 347, 347 (1906). Formylation of benzene, alkylbenzenes or

Gattermann Aldehyde Synthesis L. Gattermann, Ber. 31, 1149 (1898); Ann. 313, (1907). Preparation of phenolic aldehydes, phenol ethers or heterocyclic co

Pictet-Gams Synthesis A. Pictet, A. Gams, Ber. 43, 2384 (1910). Formation of isoquinolines by cyclization of acylated aminomethyl phenyl carbinols or t