ChemInform Abstract: One‐Pot Preparation of Trifluoromethylated Homoallylic N‐Acylhydrazines or α‐Methylene‐γ‐lactams from Acylhydrazines, Trifluoroacetaldehyde Methyl Hemiacetal, Allyl Bromide and Tin. Issue 22 (12th May 2016)