Studies of Peroxycompounds. II. Preparation of Diethyl-t-butoxy-malonate and Ethyl-t-butoxy-acetoacetate.
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چکیده
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postnatal studies of bats (pipistrellus kuhlii and miniopterus schreibersii) & histomorphology and histochemistry studies of organs and diseases of (neurergus microspilotus and n. kaiseri)
1. to determine whether difference in birth body mass influenced growth performance in pipistrellus kuhlii we studied a total of 12 captive-born neonates. bats were assigned to two body mass groups: light birth body mass (lbw: 0.89 ± 0.05, n=8) and heavy birth body mass (hbw: 1.35 ± 0.08, n=4). heavier body mass at birth was associated with rapid postnatal growth (body mass and forearm length) ...
Reactivity and catalytic activity of tert-butoxy-aluminium hydride reagents.
The reactivity and catalytic activities of the tert-butoxy aluminium hydride reagents [((t)BuO)xAlH3-x] [x = 1 (1), 2 (2)] and (L)Li[((t)BuO)2AlH2] [L = THF (3), 1,4-dioxane (4)] are investigated. The structural characterisation of the novel compounds 3 and 4 shows that the nature of the hydridic species present is affected dramatically by the donor ligand coordinating the Li(+) cation. Stoichi...
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In the title compound, C(26)H(26)O(4), steric crowding of the Ph(3)C- group with the -CH(CO(2)Et)(2) unit leads to a long C-C bond [1.585 (2) Å]. One of the two ethyl groups is disordered over two sites in a 60:40 ratio.
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M anuela Klein, Ivar Ugi* Organisch-Chemisches Institut der Technischen Universität München, Lichtenbergstraße 4. D-85748 Garching, Germany Z. Naturforsch. 50b, 948-952 (1995); receifed November 11, 1994 Oligonucleotides, Phosphite Triesters Chloro-N,N-dimethylaminoand chloro-N,N-diisopropylamino-2.2,2-trichloro-/‘eA-r-butoxyphosphine are demonstrated as reagents in the automated solid-phase ol...
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The cycloalkylation of diethyl malonate and ethyl cyanoacetate with alkyl dihalide was investigated by using comminuted potassium carbonate as a base and toluene as a solvent in the presence of hexadecyltrimethylammonium bromide (HTMAB) as a phase-transfer catalyst, which provided a conventional procedure with the advantage of short reaction period and high product yield. The factors influencin...
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ژورنال
عنوان ژورنال: Acta Chemica Scandinavica
سال: 1959
ISSN: 0904-213X
DOI: 10.3891/acta.chem.scand.13-1716b