Total synthesis of the antitumor antibiotic (±)-streptonigrin: first- and second-generation routes for de novo pyridine formation using ring-closing metathesis.
Total synthesis of the antitumor antibiotic (±)-streptonigrin: first- and second-generation routes for de novo pyridine formation using ring-closing metathesis.
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DOI:
10.1021/jo402388f
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发表时间:
2013-12-20
期刊:
影响因子:
--
通讯作者:
Baker DB
中科院分区:
文献类型:
--
作者:
Donohoe TJ;Jones CR;Kornahrens AF;Barbosa LC;Walport LJ;Tatton MR;O'Hagan M;Rathi AH;Baker DB
The total synthesis of (±)-streptonigrin, a potent tetracyclic aminoquinoline-5,8-dione antitumor antibiotic that reached phase II clinical trials in the 1970s, is described. Two routes to construct a key pentasubstituted pyridine fragment are depicted, both relying on ring-closing metathesis but differing in the substitution and complexity of the precursor to cyclization. Both routes are short and high yielding, with the second-generation approach ultimately furnishing (±)-streptonigrin in 14 linear steps and 11% overall yield from inexpensive ethyl glyoxalate. This synthesis will allow for the design and creation of druglike late-stage natural product analogues to address pharmacological limitations. Furthermore, assessment of a number of chiral ligands in a challenging asymmetric Suzuki–Miyaura cross-coupling reaction has enabled enantioenriched (up to 42% ee) synthetic streptonigrin intermediates to be prepared for the first time.
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影响因子:
3.5
作者:
Fryatt, T;Pettersson, HI;Moody, CJ
通讯作者:
Moody, CJ
影响因子:
15
作者:
CHIU, YYH;LIPSCOMB, WN
通讯作者:
LIPSCOMB, WN
影响因子:
5.2
作者:
Donohoe, Timothy J.;Fishlock, Lisa P.;Procopiou, Panayiotis A.
通讯作者:
Procopiou, Panayiotis A.
DOI:
10.1139/o76-034
发表时间:
1976-01-01
期刊:
CANADIAN JOURNAL OF BIOCHEMISTRY
影响因子:
--
作者:
CONE, R;HASAN, SK;MORGAN, AR
通讯作者:
MORGAN, AR
影响因子:
2.1
作者:
Donohoe, Timothy J.;Bower, John F.;Callens, Cedric K. A.
通讯作者:
Callens, Cedric K. A.