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1
Comprehensive Organic Functional Group Transformations II: A ...
Functions Bearing Two Nitrogens 4.09.1 Introduction 4.09.2 Geminal Diamino
AIkanes—Aminals 4.09.3 Geminally Substituted Alkanes Bearing One Amino
And One Acylated Or Sulfonated Amino Group 4.09.4 Geminally Substituted
Alkanes ...
2
Organic Synthesis Via Examination of Selected Natural Products
Compounds of type 198 (Prostaglandins-25) and 206 (Prostaglandins-26) are
known as geminally activated cyclopropanes. They are cyclopropanes with two
electron-withdrawing groups positioned on one of the cyclopropane carbons.
3
Science of Synthesis: Houben-Weyl Methods of Molecular ...
As with the synthesis of trisubstituted azines 4 (see Section 27.16.1.4) the
reaction of hydrazones with an appropriate aldehyde, in this case formaldehyde,
is a precedented approach to the synthesis of geminally disubstituted azines.
Selective ...
Varinder K. Aggarwal, Daniel Bellus, Steven J. Collier, 2014
4
Comprehensive Organic Functional Group Transformations: ...
... 4.09.5.9 gem-Diimino Alkanes and gem-Diisocyanides 437 4.09.5.10 gem-
Difluoroamino Alkanes 439 4.09.6 GEMINALLY SUBSTITUTED ALKANES
BEARING TWO DIFFERENT DICOORDINATE OR HETEROSUBSTITUTED
NITROGENS ...
Alan R. Katritzky, Otto Meth-Cohn, Gordon W. Kirby, 1995
5
Modern Cyclophane Chemistry
meta: 8%, whereas the geminally-substituted product was isolated in 70% yield.
When, in contrast, 4-bromo-[2.2]paracyclophane was nitrated or the cyano
compound brominated little transannular directive influence was visible [35].
Since ...
Rolf Gleiter, Henning Hopf, 2006
6
Phosphorus-Nitrogen Compounds: Cyclic, Linear, and High ...
XXXVIII yield geminally substituted products. However, if an SNl-type mechanism
operates, it could be argued that ionization of a halogen atom from phosphorus
might be facilitated by the presence of an electron-supplying substituent at the ...
7
Pseudo-peptides in Drug Discovery
Enantiopure geminally substituted amino acids 59 and 60 were prepared from a
common dialkylated succinate precursor via a regioselective Curtius
rearrangement [147]. Polyproline [148, 149], proline-oligomers [150] and
oligomers of ...
8
Annual Reports in Medicinal Chemistry
R =H.R=F 2Z,R =1-|,n= 4-Geminally substituted cyclopentene methyl sulfones §
_0_ were synthesized in order to probe spatial requirements of the enzyme in
regions above and below the plane of the inhibitor double bond (58-61). For
methyl ...
9
Stereochemistry of Organic Compounds: Principles and ...
(XXo) (XXIo) : X =>OH , Y = Me (XXb) (XXIb) (XXIIa) (XXIIb) (XXIII) (XXIV) H— C (
XXV) Figure 10.11 Conformations of geminally substituted cyclohexanes 10.4.2
Disubstituted cyclohexanes Non-geminally disubstituted cyclohexanes exist in ...
10
Modern Organonickel Chemistry
The palladium-catalyzed hydroboration under similar conditions takes place in a
1,4-addition fashion, yielding a geminally heterosubstituted allene [19]. Tab. 4.3.
Transition metal-catalyzed hydroboration of1-(alkylthio)alkyne with ...
