Zobrazeno 1 - 10
of 89
pro vyhledávání: '"Ram P. Kashyap"'
Publikováno v:
Inorganic Chemistry. 41:7113-7124
A series of new (silylamino)phosphines that contain sterically bulky silyl groups on nitrogen were prepared by deprotonation/substitution reactions of the hindered disilylamines t-BuR(2)Si(Me(3)Si)NH (1, R = Me; 2, R = Ph) and (Et(3)Si)(2)NH (3). Seq
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ccccae35f28bbdb2e70a6e00a99a163
https://doi.org/10.1021/ic025951n
https://doi.org/10.1021/ic025951n
Autor:
Ram P. Kashyap, Mariusz Krawiec, Lawrence D. Fitz, Lance M. Williams, Susan A. Bourne, William H. Watson, Richard B. Walker
Publikováno v:
Journal of Chemical Crystallography. 27:35-44
The rates of hydrolysis of oxazolidines with ortho-hydroxyphenyl substituents at C(2) are more than 30 times faster than oxazolidines with para-hydroxyphenyl substituents. The later rates are identical to those with a phenyl group at C(2) indicating
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d6b4dc7e0538bb1f662b08b15065a7bf
https://doi.org/10.1007/bf03543085
https://doi.org/10.1007/bf03543085
Autor:
Ram P. Kashyap, William H. Watson, Zuyue Du, Florencio Zaragoza, Zenghui Liu, D. Vidyanand, Herman L. Ammon, L. Kathleen Talafuse, Alan P. Marchand, Kaipenchery A. Kumar, Simon G. Bott
Publikováno v:
Tetrahedron. 52:9703-9712
Polycyclic bis-epoxides 5, 6, and 7 have been synthesized, and their structures established unequivocally via application of single crystal X-ray crystallographic methods. The crystal densities of 2–7 (calculated from X-ray crystallographic data) a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e4d7e9f15f3bfb333c2c6429eba45fa5
https://doi.org/10.1016/0040-4020(96)00509-1
https://doi.org/10.1016/0040-4020(96)00509-1
Publikováno v:
Synthetic Communications. 26:819-825
HEXACYCLO[7.4.0.02,8.03,7.06,11]tridecane-10,13-dione (“homosecohexaprismane-10,13-dione”, 8) has been prepared via a six-step sequence that results in homologation of two of the cyclopentane rings in pentacyclo[5.4.0.02,6.03,10.05,9]-undecane-8,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bee8dd5130c64129c9b941a2fa1d2f10
https://doi.org/10.1080/00397919608086758
https://doi.org/10.1080/00397919608086758
Autor:
Mahendra N. Deshpande, Dayanada Rajapaksa, Alan P. Marchand, Ram P. Kashyap, William H. Watson
Publikováno v:
Journal of Chemical Crystallography. 25:573-578
Hexacyclo[6.5.0.02,7.04,12.05,10.09.13]tridecane (HCTD) contains two four-membered, two five-membered and two six-membered rings fused into a cage structure which contains about 77.0 kcal/mol of strain energy. Attempts to prepare the thioketal from t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::24d992f498a54c56bbf961e8e5125d33
https://doi.org/10.1007/bf01667026
https://doi.org/10.1007/bf01667026
Autor:
Robert A. Gau, Douglas N. Butler, Paul M. Tepperman, Ronald N. Warrener, Ram P. Kashyap, William H. Watson
Publikováno v:
Tetrahedron Letters. 36:6145-6148
New rigid cavity molecules are described in which bromides, epoxides, olefins, alcohols and acetates are positioned such that there is direct line of sight between them. Examples are provided of systems where the separation distances are in the range
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::54ef8a3d19085a09b54f9f7e55f20e29
https://doi.org/10.1016/0040-4039(95)01164-d
https://doi.org/10.1016/0040-4039(95)01164-d
Publikováno v:
Journal of Chemical Crystallography. 25:339-349
The stepwise addition of thiophenol to benzoquinone gives thiophenylbenzoquinone (1b), 2,5-and 2,6-di-(thiophenyl)benzoquinone (2,3),2,3,6-tri(thiophenyl)benzoquinone (4) and 2,3,5,6-tetra(thiophenyl)benzoquinone. (5). Compounds1–4 can be crystalli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d2ad45ccf9b251f34b2127b867415e9
https://doi.org/10.1007/bf01796060
https://doi.org/10.1007/bf01796060
Publikováno v:
Journal of the American Chemical Society. 117:586-601
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb1451c8c1fb0b63557b891ef80bb1cb
https://doi.org/10.1021/ja00107a002
https://doi.org/10.1021/ja00107a002
Publikováno v:
Journal of Chemical Crystallography. 24:627-638
Seven β2 complexes have been investigated and the structural parameters compared with literature values and molecular mechanics calculations. All β2 compounds exhibit the (S,S,λλδ) or, (R,R,δδλ) configuration. Three of the β2 complexes have
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0d7ab0a5ee99b7b52816d0e1f2c85570
https://doi.org/10.1007/bf01671678
https://doi.org/10.1007/bf01671678
Autor:
Ram P. Kashyap, William H. Watson, Mariusz Krawiec, Yanjun Wang, Thomas F. Carlson, Duoli Sun, Alan P. Marchand
Publikováno v:
Journal of Chemical Crystallography. 24:259-266
2,8,10,11-Tetrachloro-12-oxahexacyclo[7,2.1.02.8.03.7.04.11.06.10]dodeca-1,9-diol is a strained cage molecule containing six five-membered rings and a four-membered ring. Twenty-five of the internal angles are less than 105° with 6 ranging from 89.5
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3020ae536f4ac5bcf36cbd374aeef704
https://doi.org/10.1007/bf01670354
https://doi.org/10.1007/bf01670354