Diols reaction with

J-Oxenols[14] and oximes[15] can also be phosphonylated successfully in this way. In the reaction with diols, selective monophosphonylation has been achieved.[14]... 

A new class of functional comonomers exemplified by acrylamidobutyraldehyde dialkyl acetals 1 and their Interconvertible cyclic hemlamidal derivatives 2 were prepared and their chemistry was Investigated for use In polymers requiring post-crosslInking capability. These monomers do not possess volatile or extractable aldehyde components and exhibit additional crosslinking modes not found with conventional am1de/forma1dehyde condensates, eg, loss of ROH to form enamides 9 or TO and facile thermodynamically favored reaction with diols to form cyclic acetals. 

Reaction With Diols - With pentan-2,4-d1ol, both 1 and 2 (R =He) are converted with high selectivity to open chain cyclic acetals 11. In excess methanol or water with one equivalent of added diol, acetals H form In 8054 yield at room temperature. 

The dimer then forms trimer by reaction with diol monomer... 

Cyclic carbonates are not commercially available and have to be synthesized prior to use. As a result, commercially available carbonates such as diethyl carbonate [55-57] or diphenyl carbonate [93] were evaluated in polycondensation reactions with diols to prepare polycarbonates since they allow a broader spectrum of polymers to be accessed. Unfortunately, polymerizations employing diethyl carbonate require the use of an excess diethyl carbonate [55]. Nevertheless, polymers with molecular weight of 40kDa were achieved within 16 h. Also, the polymerization of diphenyl carbonate with butane-1,4-diol or hexane-1,6-diol via the formation of a cyclic dimer produced polymers with molecular weights ranging from 119 to 339kDa [93]. 

Phthalimidoglutaric acid (18), readily prepared from glutamic acid and phthalic anhydride, has served as a precursor for the preparation of several interesting condensation polymers (76MI1110l). For example, it is readily transformed (Scheme 7) into diisocyanate (19), which was utilized for the preparation of a number of optically active polyureas (by reaction with diamines), polyurethanes (by reaction with diols) and polyurea-urethanes (by reaction with amino alcohols). 

Isatin-3-ketals are obtained by reaction with diols under homogeneous356 or heterogeneous acid catalysis, employing the strongly acidic resin Dowex 50X-X2357 or by... 

More recently, dithionylium salts (3.45A) have been explored for reactions with diols, amines and even azide [225], in the presence of fluoride sources, and an electrophilic brominating agent 5,5-dimethylhydantoin (DBH) to effect desulphurisation. High yields are obtained under very mild conditions (Figure 3.45). 

Two leaving groups which are required for 1,5-homoelimination (see equation 16) are involved in the reductive process generating homotropilidenes (equation 27) Similar reactions with diols or a dimesylate as starting materials apply or NaC as... 

Templates containing diols can be reacted with monomers carrying a carbonyl functionality to form acetals or ketals. In the same way, carbonyl containing templates can be derivatized with polymerizable groups by reaction with diol containing monomers. This approach has, for example, been applied to the imprinting of mono- and di-ketones [60-63] and alcohols [64],... 

Artrads. [Aquaness] Dimer trimer polybasic acids intermediate fw reaction with diols, polyols, and polyamines to produce conx>sion inhibimrs. 

The Mitsunobu alkylation conditions of 48 also exhibit high chemoselectivity when subjected to reaction with diol 4731 In this example, judicious choice of phosphine and diazo compound dictate which alcohol is activated. Using h-Bu3P in combination with TMAD (TV,N,V, /V -tetramethylazodicarboxamide) gives primarily reaction with the primary alcohol yielding 49. Whereas, Me3P and ADDP (l,l -(azodicarbonyl)-dipiperidide) allow for reaction at the secondary alcohol with another equivalent of 48 giving a fully protected di-amine 50. 

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