Switching from S- to R-Selectivity in the Candida antarctica Lipase B-Catalyzed Ring-Opening of ö-Methylated Lactones: Tuning Polymerizations by Ring Size (Record no. 45336)
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| fixed length control field | 02073nam a2200277Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | MX-MdCICY |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20250625140644.0 |
| 040 ## - CATALOGING SOURCE | |
| Transcribing agency | CICY |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) | |
| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) | B-11109 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 250602s9999 xx |||||s2 |||| ||und|d |
| 245 10 - TITLE STATEMENT | |
| Title | Switching from S- to R-Selectivity in the Candida antarctica Lipase B-Catalyzed Ring-Opening of ö-Methylated Lactones: Tuning Polymerizations by Ring Size |
| 490 0# - SERIES STATEMENT | |
| Volume/sequential designation | J. Am. Chem. Soc., 129(23), p.7393-7398, 2007 |
| 520 3# - SUMMARY, ETC. | |
| Summary, etc. | Novozym 435-catalyzed ring-opening of a range of ö-methylated lactones demonstrates fascinating differences in rate of reaction and enantioselectivity. A switch from S- to R-selectivity was observed upon going from small (ring sizes e7)to large lactones (ring sizes g8). This was attributed to the transition from a cisoid to a transoid conformational preference of the ester bond on going from small to large lactones. The S-selectivity of the ring-opening of the small, cisoid lactones was low to moderate, while the R-selectivity of the ring-opening of the large transoid lactones was surprisingly high. The S-selectivity of the ring-opening of the small, cisoid lactones combined with the established R-selectivity of the transesterification of (aliphatic)secondary alcohols prevented polymerization from taking place. Ringopening of the large, transoid lactones wasR-selective with high enantioselectivity. As a result, these lactones could be polymerized, without exception, by straightforward kinetic resolution polymerization, yielding the enantiopure R-polyester with excellent enantiomeric excess (>99 |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Van Buijtenen, J. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Van As, B.A.C. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Verbruggen, M. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Roumen, L. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Vekemans, J.A.J.M. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Pieterse, K. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Hilbers, P.A.J. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Hilbers, P.A.J. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Palmans, A.R.A. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Meijer, E.W. |
| 856 40 - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="https://drive.google.com/file/d/1N6g-zq8kOxoUUrb9TsyMUfrJMkqr3nZQ/view?usp=drivesdk">https://drive.google.com/file/d/1N6g-zq8kOxoUUrb9TsyMUfrJMkqr3nZQ/view?usp=drivesdk</a> |
| Public note | Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Clasificación local |
| Koha item type | Documentos solicitados |
| Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Collection | Home library | Current library | Shelving location | Date acquired | Total checkouts | Full call number | Date last seen | Price effective from | Koha item type |
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| Clasificación local | Ref1 | CICY | CICY | Documento préstamo interbibliotecario | 25.06.2025 | B-11109 | 25.06.2025 | 25.06.2025 | Documentos solicitados |