Direct aromatic tert-butylation during the synthesis of thiochroman-4-ones
摘要:
The synthesis of thiochroman-4-ones from thiophenols and 3-methylbut-2-enoic acid effected by methane sulphonic acid is accompanied by tert-butylation of the aromatic ring. 3-Arylthiobutanoic acids, available using beta-butyrolactone, are efficiently cyclised in the same manner.
Direct aromatic tert-butylation during the synthesis of thiochroman-4-ones
作者:Stephen E. Clayton、Christopher D. Gabbutt、John D. Hepworth、B.Mark Heron
DOI:10.1016/s0040-4020(01)80335-5
日期:1993.1
The synthesis of thiochroman-4-ones from thiophenols and 3-methylbut-2-enoic acid effected by methane sulphonic acid is accompanied by tert-butylation of the aromatic ring. 3-Arylthiobutanoic acids, available using beta-butyrolactone, are efficiently cyclised in the same manner.
Small Changes Make the Difference for SIRT2: Two Different Binding Modes for 3-Arylmercapto-Acylated Lysine Derivatives
inhibitors bind with the 3-aryl-mercapto moiety in the selectivity pocket of Sirtuin 2, inducing a rearrangement of the active site. In contrast, 3-aryl-mercapto-nonalyl or palmitoyl derivatives are characterized by a switch in the binding mode blocking both the hydrophobic channel by the fatty acyl chain and the nicotinamide pocket by the 3-aryl-mercapto moiety.