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A highly stereocontrolled syn‐addition of silicon nucleophiles across cyclopropenes with two different geminal substituents at C3 is reported. Diastereomeric ratios are excellent throughout (d.r.≥98:2) and enantiomeric excesses usually higher than 90 %, even reaching 99 %. This copper‐catalyzed C−Si bond formation closes the gap of the direct synthesis of α‐chiral cyclopropylsilanes.
Double-side tabular permanent magnet linear synchronous motors (PMLSM), which is incorporated with high power pulse technology, so as to be high power pulsed-PMLSM (PP-PMLSM), is mainly applied in the aspect of short-term acceleration. Under large current, the motor generates high instantaneous thrust and accelerates the load immediately to the expected velocity. The high winding current density and...
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