Discussion Addendum for: 5-endo-trig cyclization of 1,1-difluoro-1-alkenes: synthesis of 3-butyl-2-fluoro-1-tosylindole (1H-indole, 3-butyl-2-fluoro-1-[(4-methylphenyl)sulfonyl]-)

A checked procedure from Organic Syntheses, the journal whose preparations are repeated in a second laboratory before publication. The full experimental, with amounts, hazards and characterisation data, is on orgsyn.org.