Total synthesis of spirangien

Fortunately, in coimection with the total synthesis of spirangien-A, the Stork-Wittig olefination was shown to provide the corresponding (Z)-compound 621 also, in a Z/E ratio of 19 1 [232]. 

SCHEME 2.147 Key steps toward Paterson total synthesis of spirangien A. 

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See also in sourсe #XX -- [ , , ]

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