Functionalized templates for the convergent assembly of polyethers: synthesis of the HIJK rings of gymnocin A.
Functionalized templates for the convergent assembly of polyethers: synthesis of the HIJK rings of gymnocin A.
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DOI:
10.1002/anie.200900924
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发表时间:
2009
影响因子:
16.6
通讯作者:
Jamison, Timothy F.
中科院分区:
文献类型:
--
作者:
Van Dyke, Aaron R.;Jamison, Timothy F.
Epoxide-opening cascades offer an attractive strategy for the construction of trans-syn-fused arrays of oxygen heterocycles, a hallmark of ladder-type polyether natural products such as gymnocin A. We have previously described efficient water-promoted cascades templated by a minimally functionalized tetrahydropyran (THP) ring, the products of which were not directly amenable to further elaboration. To expand the utility of this methodology in target-oriented synthesis, we have now developed two highly functionalized heterocycles that not only serve as templates but also possess differentiated functional groups for modification and fragment coupling. One of these templates (THP 2), resembles ring K of the natural product gymnocin A (Figure 1). The other functionalized template (1,3-dioxane 5), while not found in ladder polyethers, is synthetically versatile and can easily be transformed into rings present in gymnocin A. The reactivity and selectivity patterns of this novel dioxane template are significantly different from and thus complementary to those of THP-based templates in water.
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影响因子:
2.1
作者:
NICOLAOU, KC;NUGIEL, DA;HWANG, CK
通讯作者:
HWANG, CK
影响因子:
1.8
作者:
NICOLAOU, KC;DUGGAN, ME;LADDUWAHETTY, T
通讯作者:
LADDUWAHETTY, T
影响因子:
15
作者:
Tu, Y;Wang, ZX;Shi, Y
通讯作者:
Shi, Y
影响因子:
56.9
作者:
Vilotijevic, Ivan;Jamison, Timothy F.
通讯作者:
Jamison, Timothy F.
影响因子:
2
作者:
Koch, G;Loiseleur, O;Altmann, KH
通讯作者:
Altmann, KH