A Convenient Synthesis of 3-Arylbutanolides and 3-Arylbutenolides
摘要:
A series of 3-aryl-substituted butenolides and butanolides has been prepared in a common short synthetic sequence from the corresponding aryl aldehydes. The 3-arylbutanolides are prepared by cyclisation of 3-aryl-3-cyano-1-propanols, obtained by selective reduction of 3-aryl-3-cyanopropionate esters, and are converted to 3-arylbutenolides by a sulfoxide or selenoxide elimination reaction.
The invention relates to a compound of formula
wherein
Ar
1
, Ar
2
, R
1
, R
2
, R
3
, R
4
, R
5
, and R
5′
or to a pharmaceutically active salt thereof.
The compounds are high potential NK-3 receptor antagonists for the treatment of depression, pain, psychosis, Parkinson's disease, schizophrenia, anxiety and attention deficit hyperactivity disorder (ADHD).