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We report on the syntheses of NeuAc and NeuGc‐containing glycosides via the use of double carbonyl‐protected N‐acetyl sialyl donors. The 7‐O,9‐O‐carbonyl protection of an N‐acyl‐5‐N,4‐O‐carbonyl‐protected sialyl donor markedly increased the α‐selectivity during glycosylation, particularly when glycosylating the C‐8 hydroxyl group of sialic acids. The N‐acyl carbamates were selectively opened with...
In this study, we examined the feasibility of germ cell‐less hybrids, produced by a cross between female blue mackerel (Scomber australasicus) and male chub mackerel (S. japonicus), as recipients in order to develop a surrogate broodstock technology for mackerels, which is attracting attention as a new aquaculture target. Donor testicular cells, isolated from the testes of a chub mackerel, were transplanted...