Analogs of Cinchona Alkaloids Incorporating a 9, 9′??Spirobifluorene Moiety

B Winter??Werner, F Diederich…

文献索引：Helvetica Chimica Acta, , vol. 79, # 5 p. 1338 - 1360

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被引用次数: 18

摘要

... Page 13. 1350 HELVETICA CHIMICA ACTA - Vol. 79 (1996) torsional angle. ... 8. Four energy minima are clearly visible (Table 1 ). Table 1 The Four Energy Minima of (8S,9 R)-5 Obtained by Systematic Variation of Both Torsional Angles u andP Minimum a ["I P ["I E,,,,, kcal mol-'1 ...