Quelet Reaction R. Quelet, Compt. Rend. 195, 155 (1932). Passage of dry hydrochloric acid through a solution in ligroin of a phenolic ether and an aliph

Pummerer Rearrangement R. Pummerer, Ber. 43, 1401 (1910). Rearrangement of sulfoxides to α-acyloxythioethers in the presence of acyclic anhydrides

Pschorr Reaction R. Pschorr, Ber. 29, 496 (1896). Synthesis of phenanthrene derivatives from diazotized α-aryl-o-aminocinnamic acids by intramolec

Prins Reaction H. J. Prins, Chem. Weekblad 16, 64, 1072, 1510 (1919), C.A. 13, 3155 (1919). Acid-catalyzed addition of olefins to formaldehyde to give 1

Prilezhaev (Prileschajew) Reaction N. Prilezhaev, Ber. 42, 4811 (1909). Formation of epoxides by the reaction of alkenes with peracids:

Prévost Reaction C. Prévost, Compt. Rend. 196, 1129 (1933), C.A. 27, 3195 (1933). Hydroxylation of olefins with iodine and silver benzoate

Ponzio Reaction G. Ponzio, Gazz. Chim. Ital. 27, I, 171 (1897). Formation of dinitrophenylmethanes from benzaldoximes by oxidation with nitrogen dioxide

Polonovski Reaction; Potier-Polonovski Reaction M. Polonovski, M. Polonovski, Bull. Soc. Chim. France 41, 1190 (1927). Rearrangement of tertiary amine o

Piria Reaction R. Piria, Ann. 78, 31 (1851). Formation of arylsulfamic acids or sulfonation products or both by refluxing aromatic nitro compounds with

Pinner Triazine Synthesis A. Pinner, Ber. 23, 2919 (1890). Preparation of 2-hydroxy-4,6-diaryl-s-triazines by reaction of aryl amidines and phosgene. Th

Rearrangement R. Fittig, Ann. 114, 54 (1860). Acid-catalyzed rearrangement of vicinal diols to aldehydes or ketones:

Coupling Reaction R. Fittig, Ann. 110, 17 (1859). Formation of pinacols by a reductive radical-radical coupling of carbonyl compounds, especially keton

Piloty-Robinson Synthesis O. Piloty, Ber. 43, 489 (1910); G. M. Robinson, R. Robinson, J. Chem. Soc. 43, 639 (1918). Formation of pyrroles by heating az

Pictet-Spengler Synthesis A. Pictet, T. Spengler, Ber. 44, 2030 (1911). Formation of tetrahydroisoquinoline derivatives by condensation of β-aryle

Pfitzinger Reaction W. Pfitzinger, J. Prakt. Chem. [2] 33, 100 (1886); 38, 582 (1888). Formation of -4-carboxylic acids by condensation of isatic acids

Pfau-Plattner Synthesis A. St. Pfau, P. A. Plattner, Helv. Chim. Acta 22, 202 (1939). Formation of azulenes by ring enlargement of indanes on addition

Perkow Reaction W. Perkow et al., Naturwiss. 39, 353 (1952). Formation of enol phosphates on treatment of α-halocarbonyl compounds with trialkyl p

Perkin Reaction W. H. Perkin, J. Chem. Soc. 21, 53, 181 (1868); 31, 388 (1877). Formation of α,β-unsaturated carboxylic acids by aldol conden

Perkin Alicyclic Synthesis W. H. Perkin, Jr., Ber. 16, 1793 (1883). Synthesis of alicyclic compounds from α,ω-dihaloalkanes and compounds co

Pelouze Synthesis J. Pelouze, Ann. 10, 249 (1834). Formation of nitriles from alkali cyanides by alkylation with alkyl sulfates or alkyl phosphates: