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0009508971
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For a closely related approach to yohimbine and protoberberine-type alkaloids, see
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For a closely related approach to yohimbine and protoberberine-type alkaloids, see: Yamaguchi, R.; Hamasaki, T.; Utimoto, K.; Kozima, S.; Takaya, H. Chem. Lett. 1990, 2161.
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18
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33846966878
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Arndtsen reported that the Pd-catalyzed coupling proceeded successfully with m-iodo-substituted aryl imines, see ref 5c
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Arndtsen reported that the Pd-catalyzed coupling proceeded successfully with m-iodo-substituted aryl imines, see ref 5c.
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19
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33846952357
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An attempted optimization by variations in the Cu(I) salts, additives Bu4NBr, temperature, and the catalyst loading led only to a minimal improvement
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4NBr), temperature, and the catalyst loading led only to a minimal improvement.
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20
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21
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33846992878
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The relative configuration of the minor diastereomer and the third diastereomer could not be assigned
-
The relative configuration of the minor diastereomer and the third diastereomer could not be assigned.
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22
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33846960963
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3,3a are approximately 7.5 Hz. Results of additional NOE experiments are presented in the Supporting Information.
-
3,3a are approximately 7.5 Hz. Results of additional NOE experiments are presented in the Supporting Information.
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23
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0001572678
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Wender, P.; Sieburth, S. M.; Petraitis, J. J.; Singh, S. K. Tetrahedron 1981, 37, 3967.
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Wender, P.1
Sieburth, S.M.2
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Singh, S.K.4
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24
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33846960362
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The presence of additional diastereomers arises likely from the two different configurations at the C-6 position R5, reflecting the presence of E/Z isomers of the diene
-
5), reflecting the presence of E/Z isomers of the diene.
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-
-
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25
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33846947762
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The spectroscopic data available for the minor product 11.2 did not permit a conclusive assignment of the relative stereochemistry.
-
The spectroscopic data available for the minor product 11.2 did not permit a conclusive assignment of the relative stereochemistry.
-
-
-
-
26
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33847006442
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In the major (exo) products 9.1-10 and 12-14 the J3a,7a coupling constants equal approximately 7.0 Hz, and J3,3a coupling constants are in the range of 0-4.5 Hz compare to data in reference 14, In the minor products 9.2-10. the J3a,7a equals approximately 12 Hz, and J3,3a coupling constant are 7 Hz. Notably, the J3,3a coupling constant for isoindolone 11.1 equals 10.6 Hz. Results of additional NOE experiments are presented in the Supporting Information
-
3,3a coupling constant for isoindolone 11.1 equals 10.6 Hz. Results of additional NOE experiments are presented in the Supporting Information.
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