- Synthesis of the C(18)-C(34) fragment of amphidinolide C and the C(18)-C(29) fragment of amphidinolide F
-
A convergent synthesis of the C(18)-C(34) fragment of amphidinolide C and the C(18)-C(29) fragment of amphidinolide F is reported. The approach involves the synthesis of the common intermediate tetrahydrofuranyl-β- ketophosphonate via cross metathesis, Pd
- Roy, Sudeshna,Spilling, Christopher D.
-
supporting information; experimental part
p. 5326 - 5329
(2011/01/05)
-
- Silylene oxonium ylides: di-tert-butylsilylene insertion into C-O bonds
-
Allylic ethers undergo insertions of silylenes into C-O bonds to form allylic silanes. Silylene insertion into C-O acetal bonds was also observed. Formation of silylene ylide intermediates led to [1,2]-Stevens rearrangement products as well as [2,3]-sigma
- Bourque, Laura E.,Haile, Pamela A.,Loy, Janice M.N.,Woerpel
-
experimental part
p. 5608 - 5613
(2009/12/01)
-
- Total synthesis of milbemycins: A synthesis of (6R)-6-hydroxy-3,4- dihydromilbemycin E
-
Following studies using benzyloxymethyl isopropenyl ketone 5 and ethyl 3-(3-furyl)-3-oxopropanoate 6, Robinson reactions between aryloxymethyl isopropenyl ketones 19 and 5 and ethyl 3-(2-trimethylsilyl-3-furyl)-3- oxopropanoate 20 were found to be stereos
- Helliwell, Madeleine,Karim, Sufia,Parmee, Emma R.,Thomas, Eric J.
-
p. 3636 - 3653
(2007/10/03)
-
- Asymmetric synthesis of (E)- and (Z)-3,7-dimethyl-2-octene-1,8-diol and callosobruchusic acid
-
Both enantiomers and regioisomers of (E)- and (Z)-3,7-dimethyl-2-octene-1, 8-diol and callosobruchusic acid, which have important biological activity were synthesized by enzymatic transesterification of primary alcohols (E)- and (Z)-10.
- Nanda,Scott, A. Ian
-
p. 963 - 970
(2007/10/03)
-
- Study of the stability of carbocations by chlorosulfonyl isocyanate reaction with ethers
-
The stability order of various alkyl, allyl, and benzyl carbocations was investigated using the novel technique for comparing the stability of carbocations in solution developed by using a simple CSI reaction with various ethers. The p-methoxycinnamyl carbocation was the most stable in our reaction system and the next stable carbocation was the p-methoxybenzyl carbocation. The stability of the other carbocations decreased with methacryl, t-butyl, cinnamyl, acryl, benzyl, 2° and allyl carbocations in that order.
- Kim, Ji Duck,Han, Gyoonhee,Jeong, Lak Shin,Park, Hyun-Ju,Zee, Ok Pyo,Jung, Young Hoon
-
p. 4395 - 4402
(2007/10/03)
-
- Zeolite β-Induced Rearrangement of Alkoxybenzyl Allyl Ethers to Aldehydes and Ketones. 5.1 Variation of the Allylic Moiety
-
Allylic PMB ethers rearranged in the presence of zeolite β to form 4-arylbutanals or 5-arylpentanones depending on the substituent pattern of the allylic moiety. Best results were obtained with substrates carrying simple substituents in the allylic 2-posi
- Wennerberg, Johan,Olofsson, Charlotte,Frejd, Torbjoern
-
p. 3595 - 3598
(2007/10/03)
-