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note
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2 at 0 °C. After 20 min of vigorous stirring at O °C, the solvent was evaporated in vacuo under gentle warming, resulting in 17a as a syrupy ocher mass which decomposed after standing at r.t.
-
-
-
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45
-
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22244465721
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note
-
3).
-
-
-
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46
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22244460345
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note
-
2). Enantiomeric excess values for all succeeding compounds were 91-93%.
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49
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0000648139
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