The proposed research explores a novel methodology for the synthesis of 1,3-diol and 1,3,5-triol functionalities via the intramolecular hydrosilation of homoallylic alcohols. Alkene facial selectivity is afforded by the use of a chiral auxiliary (aC2 symmetric binaphthol) attached to the silicon atom of the starting material. It is proposed that the chiral auxiliary will then be able to be further utilized in relaying stereochemical information throughout the product in subsequent transformations. Thus through further functionalization and manipulation 1,3-polyol functionalities should be produced. In such a way, it is proposed that the chiral auxiliary can control the absolute stereochemistry of three centers before being cleaved from the product and recycled. The importance of 1,3-polyols is born out in their vast presence in the natural product world. Several antibiotic, anti-tumor and immunosuppressant compounds contain this functionality. One such compound, (-) discodermolide, contains three 1,3,5-triol units, one of which should be accessible using the proposed methodology. To further explore the scope of silicon tethered methodology, it is proposed that all three building blocks be made using variations of the hydrosilation methodology, and an important connection in making the backbone of the natural product be performed using a silicon tethered alkene ring closing metathesis protocol.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Postdoctoral Individual National Research Service Award (F32)
Project #
1F32GM020668-01
Application #
6208532
Study Section
Medicinal Chemistry Study Section (MCHA)
Program Officer
Somers, Scott D
Project Start
2000-09-01
Project End
Budget Start
2000-09-01
Budget End
2001-08-31
Support Year
1
Fiscal Year
2000
Total Cost
$30,916
Indirect Cost
Name
University of Texas Austin
Department
Chemistry
Type
Schools of Arts and Sciences
DUNS #
City
Austin
State
TX
Country
United States
Zip Code
78712