12. Alkyne Chemistry www.GFSChemicals.com Leaders in Small Molecule Building Blocks RC CH Benzofurans Indoles Isocoumarins Isoquinolines Pyrimidines Furopyridines
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Notas del editor
Many reactions are Palladium or Copper catalyzed.
Many reactions are Palladium or Copper catalyzed.
Terminal Alkynes, Internal Alkynes, Alkynols, Amines (Ammonia to bromo alkane)
Alkylate across diphenylmethane (diphenylalkanes), Birch reductions, trans-olefins (Cis done through palladium catalysis), alkylation of nitriles
Terminal alkynes – Bromoalkane & Na/Li acetylide, Terminal alkynes & ethylene oxide (3-yn-1-ol), Na/Li acetylide & Bromochloroalkane, Acetylene & epichlorohydrin to make 2-en-4-yn-1-ols, dibromoalkane & acetylene SLA gives alpha-omega diynes.
Aldehydes(Triethylorthoformate), Ketones(from amide), Esters(chloroformate coupling, alcohols (ethlyene oxide for 3-yn-1-ols)
Symmetric and asymmetric diynes. Alkynyl grignards (displacement of alkane with acetylene), organometallic diyn (lithium) for further addition
Scores of heterocycles can be made using acetylenes. See detailed technical acetylenic presentation for more info.
Alkyl lithium and alkyl Magnesium halides. Chain lengthening of alkanes. Addition to aryl ring, alkynyl grignards for addition, Blocked alcohol addition
Dimethylformamide + alkyl lithium or Alkyl MgX (adds across carbonyl, hydrolysis splits out dimethylamine) or Triethylorthoformate + alkyl lithium or Alkyl MgX – displace two ethyl group through reaction and hydrolysis, paraformaldehyde and addition across carbonyl by alkyl lithium or grignard, michael addition for ene one (unsaturated ketone), substituded phenyl addition
Aldehydes, Ketones, Esters, alcohols (ethlyene oxide for 3-yn-1-ols)