Clever boxing: A cyclization–carbonylation–cyclization–coupling reaction of propargylacetates 1 or amides 2 in the presence of a palladium(II)–bisoxazoline (box) catalyst afforded symmetrical ketones of types 3 and 4, respectively, containing two heterocyclic groups in moderate to excellent yields (see scheme; tfa=trifluoroacetate). Compounds 3 were converted into ketones containing two 3(2H)‐furanone
Photochemistry of organic nitrogen compounds. Part III. The formation of allenes and 1,3-dienes from pyrazolenines: a photochemical reaction involving ion-pairs
作者:A. C. Day、M. C. Whiting
DOI:10.1039/j29670000991
日期:——
The photolysis of pyrazolenines normally gives cyclopropenes via a vinyldiazoalkane; but, in the present work 3-(1′-acyloxyalkyl)-5,5-dimethylpyrazolenines have been found to give allene and 1,3-diene esters in good yield, together with small quantities of a vinylallene. Attempts to trap an intermediate diazoalkene by photolysis in the presence of acid were not successful, leading merely to partial
Ruthenium‐Catalyzed Synthesis of Functionalized Dienes from Propargylic Esters: Formal Cross‐Coupling of Two Carbenes
作者:Chloé Vovard‐Le Bray、Sylvie Dérien、Pierre H. Dixneuf
DOI:10.1002/anie.200805031
日期:2009.2.9
Cross‐couplingcarbenes: The coupling of a propargylicester with a diazoalkane in the presence of [RuCl(cod)Cp*] catalyst leads to the formation of functionalized conjugated dienes with high stereoselectivity. The reaction involves the cross‐coupling of a vinylcarbene fragment, arising from a ruthenium‐catalyzedpropargylicester rearrangement, with a diazoalkane carbene.
Non-steroidal compounds that are high affinity, high selectivity modulators for androgen receptors are disclosed. Also disclosed are pharmaceutical compositions incorporating such compounds, methods for employing the disclosed compounds and compositions for treating patients requiring androgen receptor agonist, partial agonist or antagonist therapy, intermediates useful in the preparation of the compounds and processes for the preparation of the androgen receptor modulator compounds.