108693-51-2Relevant articles and documents
A new type of complex reagent, R4Pb / TiCl4
Yamamoto, Yoshinori,Yamada, Jun-Ichi,Asano, Tetsuya
, p. 5587 - 5596 (2007/10/02)
Tetraalkllleads (R4Pb) reacted quite smoothly with aldehydes R'CHO in the presence of TiCl4 to produce the corresponding alcohols (RCHOHR′) in high to good yields. The reagent system, R4Pb/ TiCl4, exhibited high chemoselectivity; only aldehydes underwent the alkylation in the presence of ketones. Further, the new reagent exhibited high 1,2- and 1,3-asymmetric induction. The transfer order of alkyl groups in the reaction of aldehydes with mixed tetraalkylleads/TiCl4 was determined; Me>Et.i-Pr?n-Bu.
Geminal prostaglandin analogs
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, (2008/06/13)
Geminal prostaglandins (P.G.'s) are synthesized which are represented by the general formula: STR1 where A is a 4 or 5 carbon atom ring-completing group (CH2)1+m --X--(CH2)z where m = 0, 1 or 2, Z = 0 or 1, 02 --CH2 --, --CH2 --CHOH--, STR2 and, when m = 0 and z = 1, is also --CH=CH-- or STR3 Y is divalent straight chain alkylene of 4 to 8 carbon atoms or r is alkyl of 4 to 7 carbon atoms; Q is --CO2 H or --CH2 OH provided that it is not --CH2 OH when X = STR4 or Y--Q taken together may be heptyl or allyl.