Study on Integrated Synthesis of Dimeric Pyranonaphthoquinones: Preparation of Versatile Synthetic Intermediate and Conversion into ent-Hemi-actinorhodin and ent-Hemi-γ-actinorhodin
作者:Yoshio Ando、Keisuke Suzuki、Mark M. Maturi、Taiju Hoshino、Nozomi Tanaka、Takahiro Sakai、Ken Ohmori
DOI:10.1055/a-2124-4161
日期:2023.10
For developing general synthetic access toward dimeric pyranonaphthoquinones including β-naphthocyclinone, actinorhodin, and γ-actinorhodin, we report stereodefined 6,9,10-trioxypyranonaphthalene as a versatile intermediate. Its robust preparation started from ethyl (S)-4-chloro-3-hydroxybutyrate. The pyranonaphthalene core was constructed by a Michael–Dieckmann sequence, and methylation using Me3Al
Total Synthesis of MS-444, a Myosin Light Chain Kinase Inhibitor
作者:KUNIAKI TATSUTA、TAKUJI YOSHIMOTO、HIROKI GUNJI
DOI:10.7164/antibiotics.50.289
日期:——
Naphthopyranone synthesis via the tandem Michael–Dieckmann reaction of ortho-toluates with 5,6-dihydropyran-2-ones
作者:Nichole P.H. Tan、Christopher D. Donner
DOI:10.1016/j.tetlet.2008.04.112
日期:2008.6
The tandem Michael-Dieckmann reaction between a series of ortho-toluates and the alpha,beta-unsaturated lactone 25 is described. The tandem reaction delivers substituted naphthopyranones in moderate (20-49%) yields, whilst limitations in the tolerance of this reaction for different substituents on the ortho-toluate are identified. Crown Copyright (C) 2008 Published by Elsevier Ltd. All rights reserved.
KANAKAM, CHARLES C.;MANI, NEELAKANDHA S.;RAMANATHAN, HALASYA;SUBBA, RAO G+, J. CHEM. SOC. PERKIN TRANS. PT 1,(1989) N1, C. 1907-1913
作者:KANAKAM, CHARLES C.、MANI, NEELAKANDHA S.、RAMANATHAN, HALASYA、SUBBA, RAO G+