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4344615681
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note
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P*)-3a might be associated with partial hydrolysis of their phosphinate moiety in the reaction mixture
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22
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4344655679
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note
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P)-3a might be associated with both loss at the purification step and partial hydrolysis of their phosphinate moiety in the reaction mixture
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4344676586
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note
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+): 279.0762; found: 279.0773
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24
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4344663569
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note
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We also examined reactions of 3b with other enzymes such as lipase AY-30 (Candida rugosa), lipase AS (Aspergillus nieger), lipase F-AP 15 (Rhizopus oryzae). While the desired reaction did not proceed in the presence of lipase AY-30, employing lipase AS gave the hydrolysis product (36% yield) as a mixture of diastereomers (1:2.1). The reaction in the presence of lipase F-AP 15 provided the product as a diastereomixture (1:2.4) in low yield (5%). Thus, lipase PS proved to be the optimum enzyme among those examined for resolving α-hydroxy-H-phosphinates
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