期刊
JOURNAL OF ORGANIC CHEMISTRY
卷 66, 期 23, 页码 7825-7831出版社
AMER CHEMICAL SOC
DOI: 10.1021/jo015936k
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资金
- NCI NIH HHS [R01 CA 90383-01] Funding Source: Medline
The addition of (P)- and (M)-allenylzinc reagents, prepared in situ through Pd-catalyzed metalation of (R)- and (S)-8-butyn-2-ol mesylates, to diastereomeric stereotriad aldehydes 8, 13, 18, and 23 of syn,syn, syn,anti, anti,anti, and anti,syn stereochemistry was examined. Additions to the former two aldehydes afforded the four anti adducts with high diastereoselectivity and negligible mismatching. Significant mismatching was observed with the latter two aldehydes and the (All)-allenylzinc reagent. An evaluation of possible transition states is presented in consideration of steric and dipolar control elements.
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