Intramolecular Ullmann condensation reaction: an effective approach to macrocyclic diaryl ethers
摘要:
The demonstration and definition of the scope of the intramolecular Ullmann condensation reaction suitable for use in macrocyclization reactions leading to 14-membered para- and metacyclophanes possessing a diaryl ether are detailed.
Total synthesis of cycloisodityrosine, RA-VII, deoxybouvardin, and N29-desmethyl-RA-VII: Identification of the pharmacophore and reversal of the subunit functional roles
作者:Dale L. Boger、Daniel Yohannes、Jiacheng Zhou、Michael A. Patane
DOI:10.1021/ja00062a004
日期:1993.5
Full details of a concise totalsynthesis of RA-VII (1) and deoxybouvardin (2) are described based on the implementation of an effective intramolecular Ullmann reaction as the key macrocyclization reaction in the preparation of the elusive 14-membered cycloisodityrosine subunit (33) of the bicyclic hexapeptides. Subsequent coupling of 34 to tetrapeptide 17 and macrocyclization with C 2 -N 3 amide bond
Total synthesis of deoxybouvardin and RA-VII: macrocyclization via an intramolecular Ullmann reaction
作者:Dale L. Boger、Daniel Yohannes
DOI:10.1021/ja00004a062
日期:1991.2
Ullmann condensation reaction for direct closure to the 14-membered diaryl ethers that have proven inaccessible or less accessible by alternative routes and the use of this key macrocyclization reaction in the totalsynthesis of RA-VII and deoxybouvardin