| |
| | ARKAT USA, Inc. |
 | | Triethylamine, as well as other tertiary amines, promote trimerisation of 1 to 3 (X-ray shown), and a possible mechanism involving potentiation via a Michael addition to 1 is proposed. |
 | | Triethylamine (0.44 ml, 3.15 mmol) in THF (2 ml) was added slowly to a stirred solution of 2-iodo-1,3-bis(phenylsulfonyl)propene (1.34g, 3.0 mmol) in THF (5 ml) at -78°C. |
 | | Triethylamine (0.17ml, 1.25 mmol) was added slowly via syringe to a solution of 1,3-bis(phenylsulfonyl)allene 1 (200mg, 0.63 mmol) in dry dichloromethane (4 ml) at 0ºC. After 2h the solvent was removed in vacuo and the residue purified directly by column chromatography-(eluent EtOAc / light petrol) to afford trimer 3 (120mg, 60%), m.p. |
| www.arkat-usa.org /home.aspx?VIEW=MANUSCRIPT&MSID=599 (1860 words) |
|