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M9490435.TXT
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Document 0435
DOCN M9490435
TI Synthesis of a series of
4-(arylethynyl)-6-chloro-4-cyclopropyl-3,4-dihydroquinazolin-2(1H-
)-ones as novel non-nucleoside HIV-1 reverse transcriptase inhibitors.
DT 9411
AU Tucker TJ; Lyle TA; Wiscount CM; Britcher SF; Young SD; Sanders WM;
Lumma WC; Goldman ME; O'Brien JA; Ball RG; et al; Merck Research
Laboratories, West Point, Pennsylvania 19486.
SO J Med Chem. 1994 Jul 22;37(15):2437-44. Unique Identifier : AIDSLINE
MED/94334899
AB As part of an ongoing effort to prepare novel non-nucleoside inhibitors
of human immunodeficiency virus type-1 (HIV-1) reverse transcriptase
(RT), a series of
4-(arylethynyl)-6-chloro-4-cyclopropyl-3,4-dihydroquinazolin 2(1H)-ones
4aa-l has been prepared. Target compounds 4a-e were synthesized via
addition of various 1-lithio-2-(aryl)alkyne nucleophiles to a
1-protected-4-cyclopropylquinazolin-2(1H)-one (7), followed by
deprotection. The 3-methyl compound 4aa was prepared in an analogous
manner, with the 3-alkylation performed prior to deprotection.
Alternatively, the target compounds 4f-l were prepared by addition of
1-lithio-2-(trimethylsilyl)acetylene to 7, followed by deprotection and
subsequent palladium-catalyzed coupling with various aryl halides. By
incorporating an aryl group onto the end of the 4-acetylene
functionality, the requirement for a metabolically labile 3-methyl group
on the dihydroquinazolinone nucleus has been eliminated. A number of the
target compounds were shown to be potent inhibitors of HIV-1 RT.
Compound 4a, which had exhibited the most favorable overall biological
profile, was resolved via a four-step procedure to provide the
enantiomers 13a and 13b. Compound 13a having the (-)-4(S) configuration
was shown to be the active enantiomer and was selected as a candidate
for further investigation.
DE Cells, Cultured Crystallography, X-Ray Human HIV-1/*ENZYMOLOGY
Quinazolines/CHEMICAL SYNTHESIS/*PHARMACOLOGY Reverse
Transcriptase/*ANTAGONISTS & INHIB JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).