Simmons-Smith cyclopropane ring synthesis, modifie

Silylynamines 23, 650 suppl. 26 Simmons-Smith cyclopropane ring synthesis, modified 26, 876... 

Modified Simmons-Smith cyclopropane ring synthesis... 

A modified Simmons-Smith reaction has been used in the stereoselective synthesis of a naturally occurring substance called U-106305 containing six cyclopropane rings. In the synthesis, four of the six rings arise by Simmons-Smith-type cyclopropanation. The red lines in the structural formula identify the bonds to the CH2 groups that are introduced in this way the blue lines identify bonds that originated with the iiutial reactant. 

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