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- W4236065958 abstract "Abstract An operationally simple in situ protection/deprotection strategy that significantly expands the scope of kinetically controlled catalytic Z ‐ and E ‐selective olefin metathesis is introduced. Prior to the addition of a sensitive Mo‐ or Ru‐based complex, treatment of a hydroxy‐ or a carboxylic‐acid‐containing olefin with commercially available HB(pin) or readily accessible HB(trip) 2 (pin=pinacolato, trip=2,4,6‐tri(isopropyl)phenyl) for 15 min is sufficient for efficient generation of a desired product. Routine workup leads to quantitative deprotection. A range of stereochemically defined Z ‐ and E ‐alkenyl chlorides, bromides, fluorides, and boronates or Z ‐trifluoromethyl‐substituted alkenes with a hydroxy or carboxylic acid group were thus prepared in 51–97 % yield with 93 to >98 % stereoselectivity. We also show that, regardless of whether a polar functional unit is present or not, a small amount of HB(pin) may be used to remove residual water, significantly enhancing efficiency." @default.
- W4236065958 created "2022-05-12" @default.
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- W4236065958 date "2019-03-13" @default.
- W4236065958 modified "2023-10-15" @default.
- W4236065958 title "Traceless Protection for More Broadly Applicable Olefin Metathesis" @default.
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- W4236065958 doi "https://doi.org/10.1002/ange.201901132" @default.
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