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. Author manuscript; available in PMC: 2019 Jan 1.
Published in final edited form as: Nat Chem. 2017 Sep 25;10(1):70–77. doi: 10.1038/nchem.2865

Table 1.

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a

yield reported is for the combination of diene iosmers (trans + endo).

b

stereoselectivity for the annulation process (trans:cis) is typically ~6:1

c

yield reported is for the 2–3 step sequence.

d

cyclization sequence was conducted without protection of the C16 hdyroxy group.

e

regioselectivity based on 1H NMR of the crude reaction product.

f

yield for this unselective process was not determined.

g

structure confirmed by X-ray diffraction - See Supporting Information.