BOC

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BOC

(Bell Operating Company) One of 22 companies that was formerly part of AT&T and later organized into seven regional companies. See RBOC.
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References in periodicals archive ?
Dramatic differences between the R- and S-pyrrolidine core structures bearing the same functional groups were not observed for the limited number of compounds prepared for this study with the exception of 4 compared to 12, both bulky t-BOC derivatives.
++++++++++++ R)-tert-Butyl-3-(methylsulfonyl)pyrrolidine-1-carboxylate (1, Method E) was isolated as pale yellow oil using triethylamine as the base (>99%); [sup.1]H NMR [delta] 5.16 (m, [sup.1]H, diastereotopic ring 3-CH); 3.30-3.58 (m, 4H, ring 2 and 5-C[H.sub.2]); 2.92 (s, 3H, mesylate C[H.sub.3]); 1.96-2.15 (m, 2H, ring 4-C[H.sub.2]), 1.32 (s, 9H, t-BOC C[H.sub.3]); [sup.13]C NMR [delta] 28.4, 28.5, 32.0, 32.6, 38.6, 38.7, 43.7, 43.9, 46.2, 51.9, 52.2, 79.8, 80.4, and 154.2; IR (film) 3488, 2979, 1694, 1410, 1366, 1170, 1118, 957, 924, and 900 [cm.sup.?1].
(S)-tert-Butyl-3-(methylsulfonyl)pyrrolidine-1-carboxylate (11, Method E) was isolated as pale yellow oil using triethylamine as the base (>99%); [sup.1]H NMR [delta] 5.16 (m, [sup.1]H, diastereotopic ring 3-CH); 3.30-3.58 (m, 4H, ring 2 and 5-C[H.sub.2]); 2.32 (s, 3H, tosylate C[H.sub.3]); 1.82-2.10 (m, 2H, ring 4-C[H.sub.2]), 1.32 (s, 9H, t-BOC C[H.sub.3]); [sup.13]C NMR [delta] 28.4, 28.5, 32.0, 32.6, 38.6, 38.7, 43.7, 43.9, 46.2, 51.9, 52.2, 79.8, 80.4, and 154.2; IR (film) 3489, 2977, 1695, 1410, 1364, 1170, 1120, 953, 924, and 900 [cm.sup.?1].