An Approach to 2,3-Methanoamino Acids with Extended Side Chains: Syntheses oftrans-BOC-cyclo-Lys(CBZ)-OH,trans-BOC-cyclo-Glu-OEt, andtrans-BOC-cyclo-Arg(CBZ)-OH
نویسندگان
چکیده
منابع مشابه
Boc-AzAla-Ala-OMe
THE TITLE COMPOUND (SYSTEMATIC NAME tert-butyl 3-{[1-(methoxy-carbon-yl)eth-yl]amino-carbon-yl}-3-methyl-carbazate), C(11)H(21)N(3)O(5), is a precursor for the study of a new class of foldamer based on aza/α-dipeptide oligomerization [Abbas et al. (2009 ▶). Tetra-hedron Lett.50, 4158-4160]. The asymmetric unit consists of one mol-ecule in an extended conformation which is stabilized by inter-mo...
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An efficient asymmetric synthesis of cyclo-archaeol and β-glucosyl cyclo-archaeol is presented employing catalytic asymmetric conjugate addition and catalytic epoxide ring opening as the key steps. Their occurrence in deep sea hydrothermal vents has been confirmed by chromatographic comparison with natural samples.
متن کاملOn the rearrangement of N-aryl-N-Boc-phosphoramidates to N-Boc-protected o-aminoarylphosphonates
Abstract Various arylamines were converted in two steps to N-Boc-N-arylphosphoramidates. LiTMP and LDA induced directed ortho-metalation at temperatures from -78 to 0 °C. The ensuing [1,3]-migration of the phosphorus atom with its substituents from the nitrogen to the ortho-carbanionic carbon atom gave N-Boc-protected o-aminoarylphosphonates. The nature of the substituent of 3-substituted pheny...
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The extended BOC-PRN discriminator is shown to work efficiently for the new cosine phased binary-offset carrier BOC(f s ,f c) signals defined for global navigation satellite systems, where, n (=2f s /f c) is an arbitrary even integer. The new unambiguous code discriminator provides good multipath mitigation performance for medium delays.
متن کاملSome Cyclo-quaternionic Lattices
The faithful lattices of rank 2(p ? 1) of the groups SL 2 (p) are described. For small primes p these and related lattices are investigated by computer. In particular a new extremal even unimodular lattice of rank 48 is constructed.
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ژورنال
عنوان ژورنال: The Journal of Organic Chemistry
سال: 1998
ISSN: 0022-3263,1520-6904
DOI: 10.1021/jo9840224