The chirality of asymmetric centers of pallescensin-1 (1a), -2 (2a), and -A (4a) was respectively assigned to be (R), (R), and (5S,10S) by the syntheses of la and 4a starting from (R)-(−)-α-cyclocitral (5a).
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Matsumoto et al. (1978) studied this question.
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