By treatment with stabilized lithium phosphonates in the presence of activated 4Å molecular sieves, unprotected α-hydroxy ketones 1 undergo a convenient Horner-Wadsworth-Emmonsolefination to give directly butenolides 3 as exclusive or predominant products.
The present invention relates to, inter alia, extracellular drug conjugates (EDC) in which an antibody or other targeting agent (e.g. a targeting moiety) is linked to a drug through a linker (e.g. a non-cleavable linker). These conjugates are useful in the treatment of disease and/or as a tool in the evaluation of biological systems.
Process for the preparation of (S)-4-fluoromethyl-dihydro-furan-2-one useful in the preparation of the DPP-IV inhibitor (S)-1 ((2S,3S,11bS)-2-amino-9,10-dimethoxy-1,3,4,6,7, 11b-hexahydro-2h-pyrido[2,1-a] isoquinolin-3-yl)-4-fluoromethyl-pyrrolidin-2-one
申请人:Abrecht Stefan
公开号:US20060270853A1
公开(公告)日:2006-11-30
This invention relates to a process of the preparation of the novel intermediate (S)-4-fluoromethyl-dihydro-furan-2-one of the formula
and with its use for the manufacture of pyrido[2,1-a]isoquinoline derivatives of the formula
which are useful for the treatment and/or prophylaxis of diseases which are associated with DPP IV.
The direct asymmetricallylicalkylation of β,γ-butenolides with MBHcarbonates to access γ,γ-disubstituted butenolides containing adjacent quaternary and tertiary chiral centers has been presented in excellent stereoselectivities (86−96% ee, dr >95:5) and moderate to good yield (50−83%). Their synthetic utility has been well demonstrated by the facile construction of bicyclic lactones bearing 4−5
GLYCOSIDE COMPOUNDS AND PHARMACEUTICAL COMPOSITIONS THEREOF
申请人:Hutchinson Charles R.
公开号:US20110319350A1
公开(公告)日:2011-12-29
The present invention provides glycoside compounds, methods of preparing such compounds, pharmaceutical compositions comprising such compounds, and a method for the treatment of hyperproliferative diseases using the same.