Electric Literature of 39657-45-9, A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 39657-45-9, Name is Isoxazolidine hydrochloride, molecular formula is C3H8ClNO. In a Article，once mentioned of 39657-45-9
The utility of alpha’-amino-alpha,beta-ynones in the chirospecific synthesis of sphingosine is demonstrated.Thus, a protected L-serine isoxazolidide has been converted to sphingosine by two routes, both via alpha,beta-ynones.The first route is very short and high yielding, merely involving two selective reductions after synthesis the appropriate alpha,beta-ynone.The second route involves alkylation of a beta-unsubstituted ynone and illustrates the synthetic versatility of the alpha’-amino-alpha,beta-ynone system.Further routes through conjugate 1,4-additions to ynones are demonstrated but are limited by the highly reactive nature of this system.
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Reference：
Oxazolidine – Wikipedia,
Oxazolidine | C3H1277NO – PubChem