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| 1. |
Synthesis of fragments of human β‐lipotropin, βh‐LPH. Part VI. The synthesis of des‐1‐tyrosine‐α‐endorphin and shortened peptides |
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Recueil des Travaux Chimiques des Pays‐Bas,
Volume 102,
Issue 11,
1983,
Page 469-474
W. A. A. J. Bijl,
J. W. van Nispen,
H. M. Greven,
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摘要:
AbstractThe synthesis of des‐1‐tyrosine‐α‐endorphin and fourteen fragments of this psychostimulant type of neuropeptide is described. In these syntheses use has been made of the classical fragment condensation
ISSN:0165-0513
DOI:10.1002/recl.19831021101
出版商:WILEY‐VCH Verlag
年代:1983
数据来源: WILEY
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| 2. |
Synthesis of alkyloxazoline derivatives of 2‐amino‐2‐deoxy‐D‐glucopyranose via phosphate intermediates |
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Recueil des Travaux Chimiques des Pays‐Bas,
Volume 102,
Issue 11,
1983,
Page 475-476
J. J. Oltvoort,
C. A. A. van Boeckel,
G. A. van der Marel,
J. H. van Boom,
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摘要:
AbstractPhosphorylation of 2‐(acylamino)‐3,4,6‐tri‐O‐acetyl‐2‐deoxy‐α/β‐D‐glucopyranose in the presence of triethylamine with 2‐chlorophenyl phosphorodi(1,2,4‐triazolide) gave 2‐alkyl(3,4,6‐tri‐O‐acetyl‐1,2‐dideoxy
ISSN:0165-0513
DOI:10.1002/recl.19831021102
出版商:WILEY‐VCH Verlag
年代:1983
数据来源: WILEY
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| 3. |
(S‐Butyldithiocarbanilato)copper(I), Cu[BuSC(S)NPh]. Preparation and crystal structure |
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Recueil des Travaux Chimiques des Pays‐Bas,
Volume 102,
Issue 11,
1983,
Page 477-479
J. Willemse,
W. P. Bosman,
J. H. Noordik,
J. A. Cras,
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摘要:
AbstractThe preparation and the crystal structure of a copper(I) complex with the deprotonedS‐Butyldithiocarbanilic ester is described. The crystals of Cu[BuSC(S)NPh] are rhombohedral [space groupR3, Z = 6, a = 14.684(3) Å, α = 112.96(4)°] with one hexameric unit in the unit
ISSN:0165-0513
DOI:10.1002/recl.19831021103
出版商:WILEY‐VCH Verlag
年代:1983
数据来源: WILEY
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| 4. |
Asymmetric induction in the addition of thioaceticS‐acid to α,β‐unsaturated esters |
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Recueil des Travaux Chimiques des Pays‐Bas,
Volume 102,
Issue 11,
1983,
Page 479-483
Jacek K. Gawroński,
Krystyna Gawrońska,
Halina Kolbon,
Hans Wynberg,
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摘要:
Abstract2‐Methylpropenoates andcis‐ ortrans‐butenedioates add thioaceticS‐acid under conditions of asymmetric catalysis bycinchonaalkaloids to give optically active thioacetates. Structural factors influencing the stereochemical outcome of the reaction are di
ISSN:0165-0513
DOI:10.1002/recl.19831021104
出版商:WILEY‐VCH Verlag
年代:1983
数据来源: WILEY
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| 5. |
Photochemical reactions of some aromatic thiones with bis(methylthio)ethyne; (4 + 2)‐ versus (2 + 2)‐cycloaddition products. Spectroscopic evidence for the equilibrium thiete ⇄ α,β‐unsaturated dithioester |
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Recueil des Travaux Chimiques des Pays‐Bas,
Volume 102,
Issue 11,
1983,
Page 484-488
A. C. Brouwer,
H. J. T. Bos,
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摘要:
AbstractIrradiation (λ>525 nm) of the aromatic thiones2in the presence of bis(methylthio)ethyne3causes two cycloaddition reactions to occur between the photochemically excited thione2and the acetylene3, as concluded from the isolated products. Compounds with structure6are believed to be products of a (4 + 2)‐cycloaddition reaction, whereas the formation of the isolated α,β‐unsaturated dithio esters4is rationalised on the basis of a (2 + 2)‐cycloaddition reaction. The preference for one reaction pathway over the other depends on the thione used and is discussed in terms of the structure of the thione2. Spectroscopic observation of the equilibrium thiete5⇌ α,β‐unsaturated dithio ester4, in solution provides direct evidence for the (2 + 2)‐photocycloa
ISSN:0165-0513
DOI:10.1002/recl.19831021105
出版商:WILEY‐VCH Verlag
年代:1983
数据来源: WILEY
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| 6. |
Etudes spectrales de la stéréoisomérie de dérivés de l'aldehyde malonique |
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Recueil des Travaux Chimiques des Pays‐Bas,
Volume 102,
Issue 11,
1983,
Page 489-495
G. Kirsch,
J. L. Mieloszynski,
D. Paquer,
C. G. Andrieu,
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摘要:
AbstractA number of aromatic derivatives of malonaldehyde have been studied by NMR (13C,1H) and IR. These techniques show that these compounds exist in solution asZenol form. For nitrile derivatives, theZas well as theEform has been identified. A detailed study of the13C chemical shifts of these compounds is reported.
ISSN:0165-0513
DOI:10.1002/recl.19831021106
出版商:WILEY‐VCH Verlag
年代:1983
数据来源: WILEY
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