A Convergent Synthetic Route to (+)-Dynemicin A and Analogs of Wide Structural Variability
作者:Andrew G. Myers、Norma J. Tom、Mark E. Fraley、Scott B. Cohen、David J. Madar
DOI:10.1021/ja9703741
日期:1997.7.1
yield of 85% and an overall yield of 2−3%. Key features of this sequence include the coupling of the enol triflate 11 and the arylboronic acid 10 (90%), the thermal deprotection/internal amidation of the coupling product 18 (84%), the use of 2-chloropyridine as an economical alternative to 2,6-di-tert-butylpyridine to promote the reaction of the quinolone 9 and triflicanhydride (85%), the highly stereoselective
Non-naturally occuring dynemicin analogs are provided, which are useful as DNA cleaving agents, cytotoxic agents, and/or anti-tumor compounds. Methods of making dynemicin analogs are also provided.
Highly Convergent Route to Dynemicins of Wide Structural Variability. Enantioselective Synthesis of Quinone Imine Precursors to Natural and Nonnatural Dynemicins
作者:Andrew G. Myers、Mark E. Fraley、Norma J. Tom
DOI:10.1021/ja00104a041
日期:1994.12
Preparation of a chiral azadiene for the synthesis of 5-aza analogues of angucyclinones
We have developed an efficient synthesis of both enantiomers of a key azadiene for the preparation of 5-aza analogues of angucyclinones through a hetero Diels–Alder reaction. These dienes were efficiently prepared via a 4-step procedure from known and readily available chiral diketoesters.