Total synthesis and structural revision of engelhardione
作者:Li Shen、Dianqing Sun
DOI:10.1016/j.tetlet.2011.06.112
日期:2011.8
The total synthesis of the macrocyclic natural product engelhardione is reported. This effort led to the structural revision of the published structure of engelhardione to that of pterocarine. The revision reflects the change of the substitution pattern of one phenyl ether ring from the meta to the para position. To confirm, pterocarine (2) and its close regioisomer 3 were subsequently synthesized
Microwave-assisted synthesis of macrocycles via intramolecular and/or bimolecular Ullmann coupling
作者:Li Shen、Charles J. Simmons、Dianqing Sun
DOI:10.1016/j.tetlet.2012.05.142
日期:2012.8
Microwave-assisted synthesis of macrocyclic diaryl ethers via intramolecular and/or bimolecular Ullmann coupling is described. Using the optimized conditions, a panel of macrocycles, with different substitution patterns, ring sizes, and linkers, has been successfully synthesized using microwave irradiation. To the best of our knowledge, this work represents the first examples of the microwave-assisted synthesis of macrocyclic diaryl ethers via intramolecular and/or bimolecular Ullmann coupling. (C) 2012 Elsevier Ltd. All rights reserved.