Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Howard Haubenstock"'
Autor:
Ronald R. Sauers, Howard Haubenstock
Publikováno v:
Tetrahedron. 61:8358-8365
Density functional computations were carried out whose objectives were to quantify the interactions of chlorine and bromine with neighboring cationic centers in a series of 1-aryl-2-haloethyl cations. Analysis of structural changes and bonding intera
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f79146272490fde8cd5490ffe076b156
https://doi.org/10.1016/j.tet.2005.06.091
https://doi.org/10.1016/j.tet.2005.06.091
Autor:
Ronald R. Sauers, Howard Haubenstock
Publikováno v:
Tetrahedron. 60:1191-1196
Conformational studies of 1-halo-2-butenylcations have been carried out by means of density functional and ab initio calculations. The presence of an adjacent vinyl group reduced the importance of bridging by halogen atoms as evidenced by geometric a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f0d05e2dec1bdbcac850348f235e219b
https://doi.org/10.1016/j.tet.2003.11.073
https://doi.org/10.1016/j.tet.2003.11.073
Publikováno v:
Macromolecular Chemistry and Physics. 199:2465-2472
The optically active epoxides (2S,3S)- and (2R,3S))-3,4-epoxy-1,2-O-isopropylidene-1,2-diols 1 and 2 were synthesized and anionically polymerized with potassium tert-butoxide as initiator. Soluble poly1's with low polydispersities (M w /M n = 1.2 - 1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::365948754a84a466dbc978563714a2ea
https://doi.org/10.1002/(sici)1521-3935(19981101)199:11<2465::aid-macp2465>3.0.co
https://doi.org/10.1002/(sici)1521-3935(19981101)199:11<2465::aid-macp2465>3.0.co
Publikováno v:
Macromolecular Rapid Communications. 16:845-849
The anionic bulk polymerization of optically active (2R, 3S)-3,4-epoxy-1,2-O-isopropylidenebutane-1,2-diol (1) and its (2 S, 3 S) diastereomer 2 was studied. Molecular weights and optical activity measurements as well as carbon and proton NMR spectra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::06dd8ba62a1a675205c9a05e75dd99cf
https://doi.org/10.1002/marc.1995.030161110
https://doi.org/10.1002/marc.1995.030161110
Autor:
Howard Haubenstock
Publikováno v:
Tetrahedron. 46:6633-6636
Isomerization of aluminum alcoholates occurs in the reduction of cyclohexanones with diisobutylaluminum 2,6-di-t-butyl-4-methylphenoxide 1 in the presence of excess ketone. Factors affecting the diastereoselectivity of reduction of cyclohexanones wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e69dbd82b24db46fc8a0988f9cd5fc2e
https://doi.org/10.1016/s0040-4020(01)87854-6
https://doi.org/10.1016/s0040-4020(01)87854-6
Autor:
Howard Haubenstock
Publikováno v:
Topics in Stereochemistry, Volume 14
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9eaad732ada9319f379914507133ba29
https://doi.org/10.1002/9780470147238.ch4
https://doi.org/10.1002/9780470147238.ch4
Autor:
Kamani Subasinghe, Howard Haubenstock
Publikováno v:
Chirality. 4:300-301
The chiral biphenyl-containing diamine 1 complexed with OsO4 oxidized trans-stilbene at –80°C to (+)-(1R;2R)-1,2-diphenyl-1,2-ethanediol in high enantiomeric excess. On the other hand, (R)- or (S)-2,2'-bis(dimethylamino)-6,6'-dimethylbiphenyl prov
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::688756b7fd2b43fa0fd7661acf243faa
https://doi.org/10.1002/chir.530040507
https://doi.org/10.1002/chir.530040507
Publikováno v:
The Journal of Organic Chemistry. 51:1180-1184
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ac9755ae385164696a29154dedd93df
https://doi.org/10.1021/jo00358a005
https://doi.org/10.1021/jo00358a005
Publikováno v:
The Journal of Organic Chemistry. 45:3443-3448
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e8a60fede1f7bc499d63ea95a0c057d3
https://doi.org/10.1021/jo01305a014
https://doi.org/10.1021/jo01305a014
Publikováno v:
Die Makromolekulare Chemie. 188:2789-2799
The polymerization of propylene oxide (PO) was studied with an initiator prepared by the reaction of (R)-(−)-3,3-dimethyl-1,2-butanediol (1) with aluminium hydride. When mixed with zinc chloride in a 1:1 mole ratio, the initiator was found to be hi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a10a07edaf0fcf8730b78ac4a727b934
https://doi.org/10.1002/macp.1987.021881201
https://doi.org/10.1002/macp.1987.021881201