United States Patent ( 10 ) Patent No . : US 6 , 677 , 371 B 1

Content Provider	Semantic Scholar
Author	Covington, Raymond
Copyright Year	2017
Abstract	Evans et al., “Synthesis and Antihypertensive Activity of 6,7-Diisubstituted trans-4-Amino-3, 4-dihydro-2, 2-dimethyl-2H-1-benzopyran-3-ols”, J.Med.Chem, 27, 1127–1131, 1984. Ashwood et al., “Synthesis and Antihypertensive Activity of 4-(Cyclic amido)-2H-1-benzopyrians”, J.Med.Chem, 29, 2194-2201, 1986. North et al., “Synthesis of 6-Cyano-2, 2-dimethyl-2H-1 benzopyran and Other Substituted 2, 2-Dimethyl-2H-1 benzopyrians”, J.Org Chem, 60,3397-3400, 1995. Chemical Abstracts, vol. 126, No. 17, 1997, Sun, HongBin, “Facile Synthesis”, p. 566. Hong Bin Sun et al., “Facile Synthesis of trans-3,4-Diol Derivatives of Substituted Chromans via Catalytic Epoxi dation”, Chinese Chemical Letters, vol. 8, No. 1, pp. 1-4, 1997.
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Language	English
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Resource Type	Patent