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For examples of chlorination of amino alcohol salts, see: (a) Back, T. G.; Nakajima, K. J. Org. Chem. 2000, 65, 4543.
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For examples of chlorination of amino alcohols with SOCl2 in the presence of bases, see: (a) Muratake, H, Natsume, M. Tetrahedron Lett 2002, 43, 2913
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2 in the presence of bases, see: (a) Muratake, H.; Natsume, M. Tetrahedron Lett 2002, 43, 2913.
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For examples of chlorination of amino alcohols with SOCl2 in the absence of bases by adding SOCl2 to amino alcohol solution, see: (a) Gursky, M. E, Ponomarev, V. A, Pershin, D. G, Bubnov, Y. N, Antipin, M. Y, Lyssenko, K. A. Russ. Chem. Bull. 2002, 51, 1562
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-
55
-
-
37549031485
-
-
8,14
-
8,14
-
-
-
-
56
-
-
37549027393
-
-
Although a slurry was obtained after prolonged agitation of the reaction mixture at ambient temperature, the precipitation of the HCl salt, which can be isolated and characterized, was believed to be a result of sojubility-driven equilibrium shift. See more discussion in the text
-
Although a slurry was obtained after prolonged agitation of the reaction mixture at ambient temperature, the precipitation of the HCl salt, which can be isolated and characterized, was believed to be a result of sojubility-driven equilibrium shift. See more discussion in the text.
-
-
-
-
57
-
-
37549031085
-
-
3.
-
3.
-
-
-
-
58
-
-
37549029932
-
-
The formation of possible sulfamide intermediate I was not observed. (Chemical Equation Presented)
-
The formation of possible sulfamide intermediate I was not observed. (Chemical Equation Presented)
-
-
-
-
59
-
-
37549036064
-
-
This process was successfully and reproducibly carried out in 5 kg scale with 1.2 equiv of SOCl2
-
2.
-
-
-
-
60
-
-
33846442000
-
-
is commercially available. For leading references of the synthesis of crispine A, see: (a) King, F. D. Tetrahedron 2007, 63, 2053.
-
is commercially available. For leading references of the synthesis of crispine A, see: (a) King, F. D. Tetrahedron 2007, 63, 2053.
-
-
-
-
62
-
-
70349913659
-
-
For examples of relative rates of cyclization as a function of ring size, see: (a) Mandolini, L. Adv. Phys. Org. Chem. 1986, 22, 1
-
For examples of relative rates of cyclization as a function of ring size, see: (a) Mandolini, L. Adv. Phys. Org. Chem. 1986, 22, 1.
-
-
-
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64
-
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0000079249
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