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48
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85043134252
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Absolute configuration of the tertiary alcohol 6 a formed with (R)-MonoPhos is R (see the Supporting Information
-
Absolute configuration of the tertiary alcohol 6 a formed with (R)-MonoPhos is R (see the Supporting Information).
-
-
-
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49
-
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85043141395
-
-
Reactions run for 48 h at −25 °C did not lead to an increase in yield
-
Reactions run for 48 h at −25 °C did not lead to an increase in yield.
-
-
-
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50
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85099672438
-
-
Treatment of, 4 a, with 2 equivalents of LiO, t, Bu (no Cu or, L1,) at −10 °C for 2.5 h results in >98 % conversion of, 4 a, and 90 % conversion to, 6, Treatment of, 4 a, with 2 equivalents of LiO, t, Bu, 5 mol % [Cu(NCMe),]PF, 10 mol %, L1, at −10 °C for 2.5 h results in >98 % conversion of, 4 a, but only 70 % to
-
6, and 10 mol % L1 at −10 °C for 2.5 h results in >98 % conversion of 4 a but only 70 % to 6.
-
-
-
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51
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33947616718
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For an example of copper(I)-catalyzed transesterification, se
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52
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85043103003
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-
The decreased e.r. value is likely due to reaction with LiOEt
-
The decreased e.r. value is likely due to reaction with LiOEt.
-
-
-
-
54
-
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85043133846
-
-
Increasing the equivalents of LiOtBu or decreasing the reaction temperature does not improve conversion into 10 e
-
Increasing the equivalents of LiOtBu or decreasing the reaction temperature does not improve conversion into 10 e.
-
-
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55
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For examples of stereoretentive reactions of organocopper alkyls, se
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For examples of stereoretentive reactions of organocopper alkyls, see:
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Ref. [16c]
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85043130237
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Steric hindrance of the primary and secondary alkyl boronic esters likely inhibits reaction
-
Steric hindrance of the primary and secondary alkyl boronic esters likely inhibits reaction.
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-
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85043142058
-
-
24 % unreacted benzophenone. The e.r. value was determined by conversion into the known corresponding diol (see the Supporting Information for details)
-
24 % unreacted benzophenone. The e.r. value was determined by conversion into the known corresponding diol (see the Supporting Information for details).
-
-
-
-
70
-
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84978689967
-
-
Studies to elucidate the boron enantiotopic group-selectivity during transmetalation are ongoing.
-
-
-
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