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Dive into the research topics where Chuangxing Guo is active.

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Featured researches published by Chuangxing Guo.


Tetrahedron Letters | 1998

The first synthesis of the aglycone of the potent anti-tumor steroidal saponin OSW-1 ☆

Chuangxing Guo; P. L. Fuchs

The protected aglycone (21e-β) of the potent anti-tumor agent OSW-1 (1) was synthesized in 9 steps from 5-androsten-3β-ol-17-one (10) in 55% overall yield. Key reactions involve ene installation of the side chain, regio and stereoselective dihydroxylation and diastereoselective reduction of the C16 ketone.


Bioorganic & Medicinal Chemistry Letters | 1999

On the relationship of OSW-1 to the cephalostatins.

Chuangxing Guo; Thomas G. LaCour; P. L. Fuchs

Antineoplastic bis-steroidal (cephalostatin-type) analogues of the saponin OSW-1 were produced from a dihydroaglycone of OSW-1. The key aglycone 6H was obtained from 5alpha-androstan-3beta-ol-17-one in 8 steps (38% yield). The SAR of the aglycones, intermediates, and hybrid analogues provide insights regarding the proposed common role of C22-oxocarbenium ions in the bioactivity of both OSW-1 and cephalostatins.


Journal of the American Chemical Society | 1998

Interphylal Product Splicing: The First Total Syntheses of Cephalostatin 1, the North Hemisphere of Ritterazine G, and the Highly Active Hybrid Analogue, Ritterostatin GN1N1

Thomas G. LaCour; Chuangxing Guo; Sudhakar Bhandaru; and Michael R. Boyd; P. L. Fuchs


Journal of the American Chemical Society | 1999

Synthesis of the North 1 Unit of the Cephalostatin Family from Hecogenin Acetate1

Seongkon Kim; Scott C. Sutton; Chuangxing Guo; Thomas G. LaCour; P. L. Fuchs


Journal of the American Chemical Society | 1996

An Efficient Protocol for the Synthesis of Unsymmetrical Pyrazines. Total Synthesis of Dihydrocephalostatin 11

Chuangxing Guo; Sudhakar Bhandaru; P. L. Fuchs; Michael R. Boyd


Organic Letters | 2000

Outer-ring stereochemical modulation of cytotoxicity in cephalostatins.

Thomas G. LaCour; Chuangxing Guo; Michael R. Boyd; P. L. Fuchs


Bioorganic & Medicinal Chemistry Letters | 1999

On topography and functionality in the B-D rings of cephalostatin cytotoxins.

Thomas G. LaCour; Chuangxing Guo; Sunghoon Ma; Jae Uk Jeong; Michael R. Boyd; Shikegi Matsunaga; Nobuhiro Fusetani; P. L. Fuchs


ChemInform | 2010

Cephalostatin Synthesis. Part 10. An Efficient Protocol for the Synthesis of Unsymmetrical Pyrazines. Total Synthesis of Dihydrocephalostatin 1

Chuangxing Guo; S. Bhandaru; P. L. Fuchs; Michael R. Boyd


ChemInform | 2010

Cephalostatin Support Studies. Part 12. The First Synthesis of the Aglycone of the Potent Antitumor Steroidal Saponin OSW-1.

Chuangxing Guo; P. L. Fuchs


ChemInform | 2010

Cephalostatin Synthesis. Part 13. Synthesis of the North 1 Unit of the Cephalostatin Family from Hecogenin Acetate.

Seongkon Kim; Scott C. Sutton; Chuangxing Guo; Thomas G. LaCour; P. L. Fuchs

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